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Engine Controls/fuel - 2.4l - Repair Instructions Buick Regal V

Testing & Diagnostics 39 illustrations ~5254 words

Scheme 1

Scheme 1: Engine Control Module Replacement
Scheme 1: Engine Control Module Replacement
CalloutComponent Name
Preliminary Procedure Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
1Electronic Control Module WARNING: Refer to Safety Glasses Warning . CAUTION: Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components. CAUTION: Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module (battery cable, powertrain control module (PCM)/engine control module (ECM)/transaxle control module (TCM) pigtail, control module fuse, jumper cables, etc.) in order to prevent internal control module damage. Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery. In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components on the circuit board. Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector gaskets when diagnosing or replacing the control module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the control module. The replacement control module must be programmed. Procedure Disconnect the electrical connectors. Release the retaining tab. If replacing, program the ECM. Refer to Control Module References . NOTE: Before removing the engine control module (ECM), use the scan tool to capture the ECM data. This captured data will then need to be restored into the NEW ECM. Refer to Control Module References .
WARNING
Refer to Safety Glasses Warning .
CAUTION
Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components.
CAUTION
Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module (battery cable, powertrain control module (PCM)/engine control module (ECM)/transaxle control module (TCM) pigtail, control module fuse, jumper cables, etc.) in order to prevent internal control module damage. Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery. In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components on the circuit board. Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector gaskets when diagnosing or replacing the control module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the control module. The replacement control module must be programmed.
NOTE
Before removing the engine control module (ECM), use the scan tool to capture the ECM data. This captured data will then need to be restored into the NEW ECM. Refer to Control Module References .

Engine Control Module Replacement

Crankshaft Position System Variation Learn

Note. The Crankshaft Position Variation Learn procedure is also required when the following service procedures have been performed, regardless of whether DTC P0315 is set: An engine replacement An engine control module (ECM) replacement A crankshaft balancer replacement A crankshaft replacement A crankshaft position sensor replacement Any engine repairs which disturb the crankshaft to crankshaft position sensor relationship.

Note. The ECM monitors certain component signals to determine if all the conditions are met to continue with the Crankshaft Position Variation Learn procedure.

  1. Ignition ON, observe the DTC information with a scan tool. Verify no other DTCs are set, except DTCs P0300-P0304, or P0315. If DTCs are set, except DTCs P0300-P0304, or P0315, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) for further diagnosis.
  2. Select the Crankshaft Position Variation Learn Procedure with a scan tool and perform the following: NOTE: Close the hood. NOTE: The engine must be at operating temperature. Block drive wheels. Set parking brake. DO NOT apply brake pedal. Turn the air conditioning (A/C) OFF. When directed, apply and hold brake pedal for the duration of the procedure. Ignition ON, engine running at operating temperature. The vehicle must remain in Park or Neutral. NOTE: While the learn procedure is in progress, release the throttle immediately when the engine starts to decelerate. The engine control is returned to the operator and the engine responds to throttle position after the learn procedure is complete. Accelerate to wide open throttle (WOT) and release when the fuel cut-off occurs.
  3. The scan tool displays Learn In Progress.
  4. The scan tool displays Learn Successful.
  5. Verify DTC P0315 ran and passed This Ignition Cycle. If DTC P0315 failed or did not run This Ignition Cycle, or another DTC is present, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/buick/regal/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) for the applicable DTC that set.
  6. Once the Crankshaft Position Variation Learn procedure has successfully completed, and in order to store the crankshaft position variation values in the ECM, turn OFF the ignition and verify all vehicle systems are OFF. This may take up to 2 minutes.

Description

The engine control module (ECM) learns the airflow through the throttle body to ensure the correct idle. The learned airflow values are stored within the ECM. These values are learned to adjust for production variation and will continuously learn during the life of the vehicle to compensate for reduced airflow due to throttle body coking. Anytime the throttle body airflow rate changes, for example due to cleaning or replacing, the values must be relearned.

An engine that had a heavily coked throttle body that has been cleaned or replaced may take several drive cycles to learn out the coking. To accelerate the process, the scan tool has the ability to reset all learned values back to zero. A new ECM will also have values set to zero.

The idle may be unstable or a DTC may set if the learned values do not match the actual airflow.

Conditions for Running the Idle Learn Procedure

Reset Procedure

  1. DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0128, P0171, P0172, P0201-P0204, P0222, P0223, P0300-P0304, P0351-P0354, P0496, P0506, P0507, P0601-P0604, P0606, P062B, P062F, P0630, P0641, P0651, P0697, P06A3, P1101, P1516, P16F3, P2101, P2119, P2122, P2123, P2127, P2128, P2135, P2138, P2176, or P2610 are not set.
  2. Ignition ON, engine OFF.
  3. The vehicle speed sensor (VSS) is 0 km/h (0 mph).

Learn Procedure

  1. DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0128, P0171, P0172, P0201-P0204, P0222, P0223, P0300-P0304, P0351-P0354, P0496, P0506, P0507, P0601-P0604, P0606, P062B, P062F, P0630, P0641, P0651, P0697, P06A3, P1101, P1516, P16F3, P2101, P2119, P2122, P2123, P2127, P2128, P2135, P2138, P2176, or P2610 are not set.
  2. The engine speed is between 450-4, 000 RPM.
  3. The engine vacuum is greater than 5 kPa.
  4. The mass air flow (MAF) is greater than 2 g/s.
  5. The ignition 1 voltage is greater than 10 V.

Reset/Learn Procedure

Reset Procedure - Performed after the throttle body is cleaned or replaced

  1. Ignition ON, engine OFF, perform the Idle Learn Reset in Module Setup with a scan tool.
  2. Engine idling, monitor the Throttle Body Idle Airflow Compensation parameter. The Throttle Body Idle Airflow Compensation value should equal 0 % and the engine should be idling at a normal idle speed.
  3. Clear the DTCs and return to the diagnostic that referred you here.

Learn Procedure - Performed after the ECM is programmed or replaced

  1. Engine idling for 3 minutes.
  2. Monitor the Desired Idle Speed and the actual Engine Speed with a scan tool.
  3. The ECM will start to learn the new idle cells and Desired Idle Speed should start to decrease.
  4. Ignition OFF for 60 s.
  5. Engine idling for 3 minutes.
  6. After the 3 minute run time the engine speed should return to normal. NOTE: During the drive cycle monitor the DTC information with a scan tool to verify DTC P0506 and P0507 do not set. If DTC P0506 and P0507 set, clear the DTCs so the ECM can continue to learn. If the engine idle speed has not been learned the vehicle will need to be driven at speeds above 70 km/h (44 mph) with several decelerations and extended idles.
  7. After the drive cycle, the engine speed should return to normal. If the engine idle speed has not been learned, turn OFF the ignition for 60 s and repeat step 6.
  8. Once the engine speed has returned to normal, clear DTCs and return to the diagnostic that referred you here.

Scheme 2

Scheme 2: Engine Coolant Temperature Sensor Replacement
Scheme 2: Engine Coolant Temperature Sensor Replacement
CalloutComponent Name
1Engine Coolant Temperature Sensor CAUTION: Refer to Fastener Caution . Procedure Disconnect the electrical connector. Tighten 20 N.m (15 lb ft)
CAUTION
Refer to Fastener Caution .

Engine Coolant Temperature Sensor Replacement

Scheme 3

Scheme 3: Mass Airflow Sensor with Intake Air Temperature Sensor Replacement
Scheme 3: Mass Airflow Sensor with Intake Air Temperature Sensor Replacement
CalloutComponent Name
1Mass Airflow Sensor Fastener (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 4 N.m(35 lb in)
2Mass Airflow Sensor Procedure Disconnect the electrical connector.
CAUTION
Refer to Fastener Caution .

Mass Airflow Sensor with Intake Air Temperature Sensor Replacement

Scheme 4

Scheme 4: Manifold Absolute Pressure Sensor Replacement
Scheme 4: Manifold Absolute Pressure Sensor Replacement
CalloutComponent Name
1Manifold Absolute Pressure Sensor Fastener CAUTION: Refer to Fastener Caution . Tighten 4 N.m(35 lb in)
2Manifold Absolute Pressure Sensor
CAUTION
Refer to Fastener Caution .

Manifold Absolute Pressure Sensor Replacement

Scheme 5

Scheme 5: Heated Oxygen Sensor Replacement - Sensor 1
Scheme 5: Heated Oxygen Sensor Replacement - Sensor 1
CalloutComponent Name
1Heated Oxygen Sensor CAUTION: Refer to Heated Oxygen and Oxygen Sensor Caution . CAUTION: Refer to Fastener Caution . Procedure Disconnect the heated oxygen sensor harness connector. If reinstalling the old sensor, coat the threads with anti-sieze compound. Refer to Adhesives, Fluids, Lubricants, and Sealers . TIP: A special anti-seize compound is used in the HO2S threads. The compound consists of liquid graphic and glass beads. The graphic tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-sieze compound applied before reinstallation. Tighten 42 N.m (31 lb ft)
CAUTION
Refer to Fastener Caution .

Heated Oxygen Sensor Replacement - Sensor 1

Scheme 6

Scheme 6: Heated Oxygen Sensor Replacement - Sensor 2
Scheme 6: Heated Oxygen Sensor Replacement - Sensor 2
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
1Heated Oxygen Sensor CAUTION: Refer to Heated Oxygen and Oxygen Sensor Caution . CAUTION: Refer to Fastener Caution . Procedure Disconnect the heated oxygen sensor harness connector. If reinstalling the old sensor, coat the threads with anti-sieze compound. Refer to Adhesives, Fluids, Lubricants, and Sealers . TIP: A special anti-seize compound is used in the HO2S threads. The compound consists of liquid graphic and glass beads. The graphic tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-sieze compound applied before reinstallation. Tighten 42 N.m (31 lb ft)
CAUTION
Refer to Fastener Caution .

Heated Oxygen Sensor Replacement - Sensor 2

Scheme 7

Scheme 7: Accelerator Pedal with Position Sensor Assembly Replacement
Scheme 7: Accelerator Pedal with Position Sensor Assembly Replacement
CalloutComponent Name
1Accelerator Pedal Position Sensor Bolt CAUTION: Refer to Fastener Caution Tighten 9 N.m(80 lb in)
2Accelerator Pedal Position Sensor
CAUTION
Refer to Fastener Caution

Accelerator Pedal with Position Sensor Assembly Replacement

Scheme 8

Scheme 8: Throttle Body Assembly Replacement
Scheme 8: Throttle Body Assembly Replacement
CalloutComponent Name
Preliminary Procedure Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement
1Throttle Body Assembly Fastener (Qty: 4) CAUTION: Refer to Fastener Caution . Procedure Disconnect the electrical connector. Tighten 10 N.m (89 lb in)
2Throttle Body Assembly Procedure Disconnect the electrical connector. Use a NEW throttle body O-ring. Perform the throttle learn procedure. Refer to Throttle/Idle Learn .
CAUTION
Refer to Fastener Caution .

Throttle Body Assembly Replacement

Throttle Body Cleaning

WARNINGTurn OFF the ignition before inserting fingers into the throttle bore. Unexpected movement of the throttle blade could cause personal injury.
CAUTIONDo not insert any tools into the throttle body bore in order to avoid damage to the throttle valve plate.
CAUTIONDo not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.
  1. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  2. Inspect the throttle body bore and the throttle valve plate for deposits. You must open the throttle valve in order to inspect all of the surfaces.
  3. Clean the throttle body bore and the throttle valve plate using a clean shop towel with Top Engine Cleaner P/N 1052626 (Canadian P/N 993026), ACDelco® P/N X66, or an equivalent product.
  4. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  5. Perform the throttle/idle learn procedure. Refer to «Throttle/Idle Learn»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .

Fuel Pressure Relief

WARNINGFuel that flows out at high pressure can cause serious injury to the skin and eyes. ALWAYS depressurize the fuel system before removing components that are under high fuel pressure.
  1. Remove the fuel pump module 20A fuse from the underhood electrical center.
  2. Start the vehicle and allow the engine to idle until the engine stops. The engine will stop in approximately 20-30 seconds.
  3. Turn the ignition OFF.

Special Tools

CH-48027-100 Digital Pressure Gauge

For equivalent regional tools, refer to Special Tools (Diagnostic Tools) .

Installation Procedure

WARNINGRemove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.
  1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions__fuel-pressure-relief) .
  2. Connect the CH-48027-1 (1) to the CH-48027-2 (2).
  3. Remove the shop towel from around the fuel pump feed pipe service port, and place in an approved gasoline container.
  4. Perform any tests and/or diagnostics as needed. For the proper usage of the «CH-48027-100»(/buick/regal/v-2009-2013/remont/oem-general-information/#general-information-special-tools) , refer to the manufacture's directions.

Removal Procedure

  1. Relieve the fuel system pressure, if required. Perform the following steps: Wrap a shop towel around the fuel pump feed pipe service port. Place the hose on the CH-48027-2 (2) into an approved gasoline container. Open the valve on the CH-48027-2 (2) in order to bleed any fuel from the fuel rail. Close the valve on the CH-48027-2 (2). Remove the hose on the CH-48027-2 (2) from the approved gasoline container. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
  2. Disconnect the CH-48027-1 (1) from the CH-48027-2 (2).
  3. Disconnect the CH-48027-2 (2) from the CH-48027-3 (3).
  4. Disconnect the CH-48027-3 (3) from the fuel Pump feed pipe service port.
  5. Install the service port cap.
  6. Install the engine cover, if required.
  7. Tighten the fuel fill cap.

Special Tool

EN 41769 Fuel Line Disconnect Tool Set

  1. Relieve the fuel system pressure before servicing any fuel system connection. Refer to the «Fuel Pressure Relief»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions__fuel-pressure-relief) .
  2. Remove the retainer from the quick-connect fitting.
  3. Blow dirt out of the fitting using compressed air.
  4. Choose the correct tool from the EN 41769 set for the size of the fitting. Insert the tool into the female connector, then push inward in order to release the locking tabs.
  5. Pull the connection apart.
  6. Use a clean shop towel in order to wipe off the male pipe end.
  7. Inspect both ends of the fitting for dirt and burrs. Clean or replace the components as required.
  1. Apply a few drops of clean engine oil to the male pipe end.
  2. Push both sides of the fitting together in order to snap the retaining tabs into place.
  3. Once installed, pull on both sides of the fitting in order to make sure the connection is secure.
  4. Install the retainer to the quick-connect fitting.

If servicing a fuel system, insure the is fuel pressure has been relieved.

  1. Using compressed air, blow any dirt out of the quick-connect fitting.
  2. This step applies to Bartholomew style connectors ONLY. Squeeze the plastic quick-connect fitting release tabs.
  3. This step applies to Q Release style connectors ONLY. Release the fitting by Pushing the tab toward the other side of the slot in the fitting.
  4. This step applies to Squeeze to Release style connectors ONLY. Squeeze where indicated by arrows on both sides of the plastic ring surrounding the quick-connect fitting.
  5. This step applies to Squeeze to Release style connectors ONLY. Push in the male side slightly in order to slide the retainer away from the retainers, squeeze where indicated by arrows on both sides of the plastic ring surrounding the quick-connect fitting.
  6. This step applies to Sliding Retainer style connectors ONLY. Release the fitting by pressing on one side of the release tab causing it to push in slightly. If the tab doesn't move try pressing the tab in from the opposite side. The tab will only move in one direction.
  7. This step applies to the Global Connector style only. Push the connector toward the tube in order to release the pressure. Press and hold down the release mechanism, and pull the connector straight out.
  8. This step applies to the TI Loc style only. Push the connector toward the tube in order to release the pressure. Release the redundant latch (1) with two fingers or a flat bladed tool. Then press and hold down the bottom release mechanism (2) and pull the connector straight out.
  9. This step applies to the Safe Lock style only. Push the connector toward the tube in order to release the pressure. Release the second latch (1) with two fingers. Then press and hold down the bottom release mechanism (2) and pull the connector straight out.
  10. This step applies to the Plastic Connector style 8, push the connector toward the tube in order to release the pressure. Press the latch (1) inward in order to release the pipe, while pulling the connector (2) straight out.
  11. Using a clean shop towel, wipe off the male pipe end.
  12. Inspect both ends of the fitting for dirt and burrs.
  13. Clean or replace components as necessary.
  1. Apply a few drops of clean engine oil to the male pipe end.
  2. Push both sides of the quick-connect fitting together in order to cause the retaining feature to snap into place.
  3. Pull on both sides of the quick-connect fitting to make sure the connection is secure.
  4. Insert the tube in the connector until the retainer snaps in place.
  5. Push down on the redundant latch (1) until it is fully engaged and snapped into position.
  6. Insert the tube in the connector until the retainer snaps in place.
  7. Push down on the second latch (1) in order to secure the connection.
  8. For the plastic connector type 8, depress the latch (1) while inserting the connector (3) on to the pipe (2).
  9. Move the latch (1) upward in order to secure the connection.
  10. Inspect for leaks using the following procedure: Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF, for 10 seconds. Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF. Inspect for leaks.

Fuel Tank Draining (Non E-85)

Special Tool

CH 45004 Fuel Tank Drain Hose

WARNINGNever drain or store fuel in an open container. Always use an approved fuel storage container in order to reduce the chance of fire or explosion.
WARNINGPlace a dry chemical (Class B) fire extinguisher nearby before performing any on-vehicle service procedures. Failure to follow these precautions may result in personal injury.
  1. Remove the fuel fill cap.
  2. Insert the CH 45004 hose into the fuel tank until the bottom is reached.
  3. Use a hand or air operated pump device in order to drain as much fuel through the fuel fill pipe as possible.

Scheme 9

Scheme 9: Fuel Tank Protector Replacement
Scheme 9: Fuel Tank Protector Replacement
CalloutComponent Name
Preliminary Procedure Remove the left fuel tank strap. Refer to Fuel Tank Replacement .
1Fuel Tank Protector Retainer (Qty: 3)
2Fuel Tank Protector

Fuel Tank Protector Replacement

  1. Relieve the system fuel pressure. Refer to «Fuel Pressure Relief»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions__fuel-pressure-relief) .
  2. Drain the fuel tank. Refer to «Fuel Tank Draining (Non E-85)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions__fuel-tank-draining-non-e-85) .
  3. Disconnect the evaporative emission and fuel pipes (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  4. Disconnect the fuel pressure sensor electrical connector (2).
  5. Loosen the hose clamps (1) and remove the filler tube (2).
  6. Disconnect the fuel tank harness electrical connector (1).
  7. Support the fuel tank with a suitable jack.
  8. Remove the fuel tank strap bolts (1).
  9. Swing the fuel tank straps (1) out of the way.
  10. Remove the fuel tank (1).
  11. Remove the following components if replacing just the fuel tank. Fuel tank fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement (NT7)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) , «Fuel Tank Fuel Pump Module Replacement (NU6)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) . Evaporative emission carbon canister. Refer to «Evaporative Emission Canister Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) . Transfer components as necessary. Remove the fuel tank protector. Refer to «Fuel Tank Protector Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions)
  1. Install the following components if fuel tank replacement was necessary: Fuel tank fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement (NT7)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) , «Fuel Tank Fuel Pump Module Replacement (NU6)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) . Evaporative emission carbon canister. Refer to «Evaporative Emission Canister Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) . Install the fuel tank protector. Refer to «Fuel Tank Protector Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions)
  2. Use a suitable jack and install the fuel tank (1).
  3. Reposition the fuel tank straps (1).
  4. Install the fuel tank strap bolts (1) and tighten to 20 N.m (15 lb ft).
  5. Connect the fuel tank harness electrical connector (1).
  6. Install the filler tube (2) and tighten the hose clamps (1) to 4Y(35 lb in).
  7. Connect the evaporative emission line (3). Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  8. Connect the evaporative emission and fuel pipes (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  9. Connect the fuel pressure sensor electrical connector (2).
  10. Install the fuel tank protector. Refer to «Fuel Tank Protector Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions)
  11. Refill the fuel tank.
  12. Inspect for fuel leaks.

Fuel System Cleaning

  1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  2. Remove the fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement (NT7)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) , «Fuel Tank Fuel Pump Module Replacement (NU6)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  3. Inspect the fuel pump module strainer. Replace the pump module assembly if the fuel strainer is contaminated.
  4. Flush the fuel tank with hot water.
  5. Pour the water out of the fuel sender assembly opening in the fuel tank. Rock the fuel tank in order to be sure that the removal of the water from the fuel tank is complete.
  6. Allow the tank to dry completely before reassembly.
  7. Disconnect the fuel feed pipe at the engine fuel rail. Refer to «Metal Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  8. Clean the fuel pipes by applying air pressure in the opposite direction of the fuel flow.
  9. Connect the fuel feed pipe to the engine fuel rail. Refer to «Metal Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  10. Install the fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement (NT7)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) , «Fuel Tank Fuel Pump Module Replacement (NU6)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  11. Install the fuel tank. Refer to «Fuel Tank Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .

J 45722 Fuel Sender Lock Ring Wrench

For equivalent regional tools, refer to Special Tools (Diagnostic Tools) .

  1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  2. Disconnect the fuel pump electrical connector (1) and the quick connects (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  3. Use the J 45722 wrench by turning counter clockwise and remove the lock ring (1).
  4. Remove the fuel tank module (1) and the O-ring (2).
  1. Install a NEW seal (2) and the fuel tank module (1).
  2. Use the J 45722 wrench by turning clockwise and install the lock ring (1).
  3. Connect the fuel pump electrical connector (1) and the quick connects (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  4. Install the fuel tank. Refer to «Fuel Tank Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .

J 45722 Fuel Sender Lock Ring Wrench

For equivalent regional tools, refer to Special Tools (Diagnostic Tools) .

  1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  2. Disconnect the fuel pump electrical connector (1) and the quick connects (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  3. Use the J 45722 wrench by turning counter clockwise and remove the lock ring (1).
  4. Remove the fuel tank module (1) and the O-ring (2).
  1. Install a NEW seal (2) and the fuel tank module (1).
  2. Use the J 45722 wrench by turning clockwise and install the lock ring (1).
  3. Connect the fuel pump electrical connector (1) and the quick connects (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  4. Install the fuel tank. Refer to «Fuel Tank Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .

Scheme 10

Scheme 10: Fuel Pump Flow Control Module Replacement
Scheme 10: Fuel Pump Flow Control Module Replacement
CalloutComponent Name
Preliminary Procedure Remove the passenger rear side trim panel. Refer to Rear Compartment Side Trim Panel Replacement (without HP6) , Rear Compartment Side Trim Panel Replacement (HP6, Left Side) , Rear Compartment Side Trim Panel Replacement (HP6, Right Side) .
1Fuel Pump Flow Control Module Fastener (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten 9 N.m (80 lb in)
2Fuel Pump Flow Control Module Procedure Disconnect the electrical connector. If replacing, reprogram the module. Refer to Control Module References .
CAUTION
Refer to Fastener Caution .

Fuel Pump Flow Control Module Replacement

Scheme 11

Scheme 11: Fuel Tank Pressure Sensor Replacement (NT7)
Scheme 11: Fuel Tank Pressure Sensor Replacement (NT7)
CalloutComponent Name
Preliminary Procedure Remove the fuel tank. Refer to Fuel Tank Replacement .
1Fuel Tank Pressure Sensor Procedure Disconnect the electrical connector. Release the retaining tab.

Fuel Tank Pressure Sensor Replacement (NT7)

Scheme 12

Scheme 12: Fuel Tank Pressure Sensor Replacement (NU6)
Scheme 12: Fuel Tank Pressure Sensor Replacement (NU6)
CalloutComponent Name
Preliminary Procedure Remove the fuel tank. Refer to Fuel Tank Replacement .
1Fuel Tank Pressure Sensor Procedure Disconnect the electrical connector. Release the retaining tab.

Fuel Tank Pressure Sensor Replacement (NU6)

WARNINGFuel Vapors can collect while servicing fuel system parts in enclosed areas such as a trunk. To reduce the risk of fire and increased exposure to vapors: Use forced air ventilation such as a fan set outside of the trunk. Plug or cap any fuel system openings in order to reduce fuel vapor formation. Clean up any spilled fuel immediately. Avoid sparks and any source of ignition. Use signs to alert others in the work area that fuel system work is in process.
  1. Remove the fuel tank pump module. Refer to «Fuel Tank Fuel Pump Module Replacement (NT7)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) , «Fuel Tank Fuel Pump Module Replacement (NU6)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  2. Using two flat-bladed tools, carefully pull both locking tabs (1) outward while simultaneously lifting the level sensor.
  3. Using a small bladed tool, gently release the retaining tabs on the electrical terminals (1) while simultaneously pulling the terminals out.
  4. Inspect the terminals for bending and reposition as necessary.
  1. Push in the electrical terminals (1) and ensure the terminals are secure.
  2. Carefully insert the level sensor until the locking tabs (1) snap into the locking position.
  3. Install the fuel tank pump module. Refer to «Fuel Tank Fuel Pump Module Replacement (NT7)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) , «Fuel Tank Fuel Pump Module Replacement (NU6)»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .

Scheme 13

Scheme 13: Fuel Tank Filler Pipe Replacement
Scheme 13: Fuel Tank Filler Pipe Replacement
CalloutComponent Name
Preliminary Procedure Remove the filler pipe housing. Refer to Fuel Tank Filler Pipe Housing Replacement .
1Filler Pipe Fastener (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 9 N.m (80 lb in)
2Rear Evaporative Emission Pipe Procedure Disconnect the quick connect fitting. Refer to Plastic Collar Quick Connect Fitting Service .
3Hose Clamp Tighten 4 N.m (35 lb in)
CAUTION
Refer to Fastener Caution .

Fuel Tank Filler Pipe Replacement

Scheme 14

Scheme 14: Fuel Pump Cover Replacement
Scheme 14: Fuel Pump Cover Replacement
CalloutComponent Name
Preliminary Procedure Disconnect electrical wiring harness from fuel pump cover.
1Fuel Pump Cover Fastener CAUTION: Refer to Fastener Caution . Tighten 10 N.m(89 lb in)
2Fuel Pump Cover
3Fuel Pump Insulator
4Fuel Injector Fuel Rail Noise Shield
CAUTION
Refer to Fastener Caution .

Fuel Pump Cover Replacement

Scheme 15

Scheme 15: Fuel Feed Pipe Replacement
Scheme 15: Fuel Feed Pipe Replacement
CalloutComponent Name
Preliminary Procedures Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement . Disconnect the fuel lines. Refer to Metal Collar Quick Connect Fitting Service .
1Fuel Feed Pipe Fastener CAUTION: Refer to Fastener Caution . Tighten 10 N.m (89 lb in)
2Fuel Feed Pipe
CAUTION
Refer to Fastener Caution .

Fuel Feed Pipe Replacement

Scheme 16

Scheme 16: Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Pipe)
Scheme 16: Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Pipe)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
1Fuel Feed Hose. Preliminary Procedures Disconnect the evaporative emission quick connects. Refer to Plastic Collar Quick Connect Fitting Service .

Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Pipe)

Scheme 17

Scheme 17: Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Front Pipe)
Scheme 17: Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Front Pipe)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
1Fuel Feed Hose. Preliminary Procedures Disconnect the evaporative emission quick connects. Refer to Plastic Collar Quick Connect Fitting Service .

Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Front Pipe)

Scheme 18

Scheme 18: Fuel Pressure Sensor Replacement - Fuel Feed Pipe
Scheme 18: Fuel Pressure Sensor Replacement - Fuel Feed Pipe
CalloutComponent Name
Preliminary Procedures Relieve the fuel system pressure. Refer to Fuel Pressure Relief . Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
1Fuel Pressure Sensor CAUTION: Refer to Fastener Caution . Procedure Disconnect the electrical connector. Use a NEW O-ring whenever the sensor is removed. Tighten 9Y (80 lb in)
CAUTION
Refer to Fastener Caution .

Fuel Pressure Sensor Replacement - Fuel Feed Pipe

Scheme 19

Scheme 19: Fuel Feed Intermediate Pipe Replacement
Scheme 19: Fuel Feed Intermediate Pipe Replacement
CalloutComponent Name
Preliminary Procedures Relieve the system pressure. Refer to Fuel Pressure Relief . Remove the fuel pump cover. Refer to Fuel Pump Cover Replacement .
1Fuel Feed Intermediate Pipe CAUTION: Refer to Fastener Caution . Procedure DISCARD the pipe when removed, and install a NEW pipe. Lubricate the pipes with silicon free engine oil. Refer to Adhesives, Fluids, Lubricants, and Sealers . Pressurize the fuel system and inspect for leaks. Tighten 30 N.m (22 lb ft)
CAUTION
Refer to Fastener Caution .

Fuel Feed Intermediate Pipe Replacement

Scheme 20

Scheme 20: Fuel Tank Vent Pipe Replacement
Scheme 20: Fuel Tank Vent Pipe Replacement
CalloutComponent Name
Preliminary Procedure Remove the fuel tank. Refer to Fuel Tank Replacement .
1Evaporative Emission Canister Vent Front Pipe Procedure Disconnect the evaporative emission quick connects. Refer to Plastic Collar Quick Connect Fitting Service .

Fuel Tank Vent Pipe Replacement

EN-48896 High Pressure Fuel Pump Installation Alignment Gauge

  1. Relieve the low and high side fuel system pressure. Refer to «Fuel Pressure Relief»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions__fuel-pressure-relief) .
  2. Disconnect the engine wiring harness electrical connector from the high pressure fuel pump.
  3. Remove the low pressure feed pipe. Refer to «Fuel Feed Pipe Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  4. Remove the high pressure pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) . Discard this pipe.
  5. Remove and discard the high pressure fuel pump bolts (1).
  6. Remove the high pressure fuel pump (2).
  7. Remove and discard the high pressure fuel pump O-ring (3).
  8. Remove and discard the high pressure fuel pump gasket (4).
  9. Remove the high pressure fuel pump roller lifter (5).
  1. Use the EN-48896 alignment gauge to ensure that the camshaft lobe is in the base circle position. At base circle the tool will be flush with the head.
  2. Lubricate the high pressure fuel pump cylinder head bore and roller lifter with camshaft prelube GM P/N 12345501 (Canadian P/N 992704) or equivalent.
  3. Install the high pressure fuel pump roller lifter (5).
  4. Install a NEW high pressure fuel pump O-ring (3).
  5. Position the NEW high pressure fuel pump gasket (4) and bolts (1) to the fuel pump.
  6. Install the high pressure fuel pump (2). Force will be required while hand tightening the bolts.
  7. Tighten the high pressure fuel pump retaining bolts to 15 N.m (11 lb ft).
  8. Ensure the high pressure fuel pump and fuel rail fittings are clean prior to assembly.
  9. Install a NEW high pressure fuel pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  10. Install the fuel feed pipe to the high pressure fuel pump. Refer to «Fuel Feed Pipe Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  11. Connect the high pressure fuel pump wiring harness.
  12. Install the fuel tank cap.
  13. Inspect for leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
  14. Install the pressure relief cap to the fuel feed pipe.
  15. Install the high pressure fuel pump cover. Refer to «Fuel Pump Cover Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions__fuel-pressure-relief) .
  2. Disconnect the fuel feed pipe quick connect fitting (1) and the evaporative emission pipe (2). Refer to «Metal Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) , and «Plastic Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
  4. Remove the fuel tank protector. Refer to «Fuel Tank Protector Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  5. Remove the fuel feed pressure sensor. Refer to «Fuel Pressure Sensor Replacement - Fuel Feed Pipe»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  6. Disconnect the fuel feed pipe quick connect fitting (1) and the evaporative emission pipe (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  7. Plug or cap the fuel feed pipe to prevent fuel loss or contamination.
  8. Disconnect the brake pipes from the plastic retainers.
  9. Remove the fuel feed and evaporative emission pipes (1) as an assembly from the vehicle.
  10. Separate the fuel feed pipe (1) from the evaporative emission pipe.
  1. Ensure that the fuel feed pipe and fittings are clean and dry prior to assembly.
  2. Install the fuel feed pipe (1) to the evaporative emission pipe.
  3. Install the fuel feed and evaporative emission pipes (1) as an assembly to the vehicle.
  4. Connect the brake pipes to the plastic retainers.
  5. Remove the plug or cap from the fuel feed pipe.
  6. Connect the fuel feed pipe quick connect fitting (1) and the evaporative emission pipe (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  7. Install the fuel feed pressure sensor. Refer to «Fuel Pressure Sensor Replacement - Fuel Feed Pipe»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  8. Install the fuel tank protector. Refer to «Fuel Tank Protector Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  9. Connect the fuel feed pipe quick connect fitting (1) and the evaporative emission pipe (2). Refer to «Metal Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) , and «Plastic Collar Quick Connect Fitting Service»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  10. Inspect for leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.

Scheme 21

Scheme 21: Fuel Injection Fuel Rail Assembly Replacement
Scheme 21: Fuel Injection Fuel Rail Assembly Replacement
CalloutComponent Name
Preliminary Procedures Relieve the fuel system pressure. Refer to Fuel Pressure Relief . Remove the intake manifold. Refer to Intake Manifold Replacement (LEA) , Intake Manifold Replacement (LUK) .
1Fuel Injection Fuel Rail Fastener (Qty: 4) CAUTION: Refer to Fastener Caution . Tighten 25Y (18 lb ft)
2Fuel Injection Fuel Rail Procedure Disconnect the electrical connector. It is necessary to rebuild the fuel injectors. Refer to Direct Fuel Injector Replacement .
CAUTION
Refer to Fastener Caution .

Fuel Injection Fuel Rail Assembly Replacement

Scheme 22

Scheme 22: Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement
Scheme 22: Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement
CalloutComponent Name
Preliminary Procedures Relieve the fuel system pressure. Refer to Fuel Pressure Relief . Remove the intake manifold. Refer to Intake Manifold Replacement (LEA) , Intake Manifold Replacement (LUK) .
1Fuel Pressure Sensor CAUTION: Refer to Fastener Caution . Procedure Disconnect the electrical connector. Tighten 32 N.m (24 lb ft)
CAUTION
Refer to Fastener Caution .

Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement

  1. Relieve the high side fuel system pressure. Refer to «Fuel Pressure Relief»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions__fuel-pressure-relief) .
  2. Remove the fuel injection fuel rail assembly. Refer to «Fuel Injection Fuel Rail Assembly Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  3. Remove and discard the fuel injector retainers (1).
  4. Clean and inspect the fuel rail and injectors. Refer to «Fuel Rail and Injectors Cleaning and Inspection (LAF, LEA, or LUK)»(/buick/regal/v-2009-2013/remont/mechanical/#engine-mechanical-24l__fuel-rail-and-injectors-cleaning-and) .
  1. Install NEW fuel injector retainers (1).
  2. Install the fuel injection fuel rail assembly. Refer to «Fuel Injection Fuel Rail Assembly Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .

Scheme 23

Scheme 23: Evaporative Emission Canister Purge Solenoid Valve Replacement
Scheme 23: Evaporative Emission Canister Purge Solenoid Valve Replacement
CalloutComponent Name
Preliminary Procedures Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement . Disconnect the evaporative emission pipes. Refer to Plastic Collar Quick Connect Fitting Service .
1Evaporative Emission Canister Purge Solenoid Fastener CAUTION: Refer to Fastener Caution . Tighten 25 N.m(18 lb ft)
2Evaporative Emission Canister Purge Solenoid Procedure Disconnect the electrical connector.
CAUTION
Refer to Fastener Caution .

Evaporative Emission Canister Purge Solenoid Valve Replacement

Scheme 24

Scheme 24: Evaporative Emission Canister Purge Pipe Replacement
Scheme 24: Evaporative Emission Canister Purge Pipe Replacement
CalloutComponent Name
Preliminary Procedure Remove the fuel tank. Refer to Fuel Tank Replacement .
1Evaporative Emission Canister Purge Pipe Procedure Disconnect the evaporative emission quick connects. Refer to Plastic Collar Quick Connect Fitting Service .

Evaporative Emission Canister Purge Pipe Replacement

Scheme 25

Scheme 25: Evaporative Emission Canister Vent Solenoid Valve Replacement
Scheme 25: Evaporative Emission Canister Vent Solenoid Valve Replacement
CalloutComponent Name
Preliminary Procedure Remove the carbon canister. Refer to Evaporative Emission Canister Replacement .
1Evaporative Canister Vent Solenoid Valve Procedure Disconnect the electrical connector.

Evaporative Emission Canister Vent Solenoid Valve Replacement

Scheme 26

Scheme 26: Evaporative Emission Canister Replacement
Scheme 26: Evaporative Emission Canister Replacement
CalloutComponent Name
Preliminary Procedure Remove the fuel tank. Refer to Fuel Tank Replacement .
1Evaporative Emission Hose (Qty: 2) Procedure Disconnect the quick connects. Refer to Plastic Collar Quick Connect Fitting Service .
2Evaporative Emission Canister Procedure Disconnect the electrical connector. Release the retaining tab.

Evaporative Emission Canister Replacement

J 41413-200 Evaporative Emission System Tested

For equivalent regional tools, refer to Special Tools (Diagnostic Tools) .

Inspection Procedure

CAUTIONUse the Evaporative Emission (EVAP) System Tester (EEST) GE 41413-A in order to provide a clean, dry, low pressure nitrogen gas source. Do not substitute any other pressurized source, gas or otherwise. Damage may result to the EVAP system, test equipment or cause a safety risk.
  1. Turn OFF the ignition.
  2. Remove the EVAP canister purge valve. Refer to «Evaporative Emission Canister Purge Solenoid Valve Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  3. Lightly tap the EVAP canister purge valve on a hard surface.
  4. Inspect for carbon particles exiting either of the vacuum ports. If no carbon particles were detected, but a blockage was detected during a diagnostic procedure, install the original EVAP canister purge valve. Continue with the cleaning procedure. If carbon particles are found during the inspection procedure, continue with the cleaning procedure. If a diagnostic procedure directed you to replace the EVAP canister purge valve and no carbon particles were detected, replace the EVAP canister purge valve. Return to the published service procedure.

Cleaning Procedure

  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/regal/v-2009-2013/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the EVAP canister. Refer to «Evaporative Emission Canister Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  3. Turn OFF the main valve on the «J 41413-200»(/buick/regal/v-2009-2013/remont/oem-general-information/#general-information-special-tools) .
  4. Disconnect the hose from the diagnostic station pressure regulator.
  5. Using a section of vacuum hose, connect one end onto the EVAP pressure/purge diagnostic station pressure regulator.
  6. Connect the other end of the vacuum hose to the canister side of the purge pipe.
  7. Turn ON the main nitrogen cylinder valve and continue to discharge nitrogen for 15 seconds.
  8. If the nitrogen does not clear the blockage, replace the purge pipe.
  9. Return the EVAP pressure/purge diagnostic station to the stations original condition.
  10. Install a new EVAP canister. Refer to «Evaporative Emission Canister Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  11. Lower the vehicle.
  12. Install a new EVAP canister purge valve. Refer to «Evaporative Emission Canister Purge Solenoid Valve Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  13. Return to the diagnostic table that sent you here.
  1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/buick/regal/v-2009-2013/remont/mechanical/#engine-mechanical-24l) .
  2. Disconnect the engine wiring harness electrical connectors (1) from the ignition coil(s) (2).
  3. Remove the ignition coil bolt(s) (1).
  4. Remove the ignition coil(s) (2).
  1. Install the ignition coil(s) (2).
  2. Install the ignition coil bolt(s) (1) and tighten to 10 N.m (89 lb in).
  3. Connect the engine wiring harness electrical connector(s) (1) to the ignition coil(s) (2).
  4. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/buick/regal/v-2009-2013/remont/mechanical/#engine-mechanical-24l) .
CAUTIONThis engine has aluminum cylinder heads. Do not remove the spark plugs from a hot engine, allow it to cool first. Removing the spark plugs from a hot engine may cause spark plug thread damage or cylinder head damage.
  1. Remove the ignition coil(s). Refer to «Ignition Coil Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  2. Remove the spark plugs (1) using a 5/8 inch spark plug socket.
  1. Install the spark plugs (1). Specification The spark plug gap is 1.0 mm (0.040 in). Tighten Tighten the plugs to 20 N.m (15 lb ft).
  2. Install the ignition coil(s). Refer to «Ignition Coil Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .

Spark Plug Usage

  1. Ensure that the correct spark plug is installed. An incorrect spark plug causes driveability conditions. Refer to the Electronic Parts Catalog.
  2. Ensure that the spark plug has the correct heat range. An incorrect heat range causes the following conditions: Spark plug fouling - colder plug Pre-ignition causing spark plug and/or engine damage - hotter plug

Spark Plug Inspection

  1. Inspect the terminal post (1) for damage. Inspect for a bent or broken terminal post (1). Test for a loose terminal post (1) by twisting and pulling the post. The terminal post (1) should NOT move.
  2. Inspect the insulator (2) for flashover or carbon tracking, soot. This is caused by the electrical charge traveling across the insulator (2) between the terminal post (1) and ground. Inspect for the following conditions: Inspect the spark plug boot for damage. Inspect the spark plug recess area of the cylinder head for moisture, such as oil, coolant, or water. A spark plug boot that is saturated causes arcing to ground.
  3. Inspect the insulator (2) for cracks. All or part of the electrical charge may arc through the crack instead of the electrodes (3, 4).
  4. Inspect for evidence of improper arcing. Measure the gap between the center electrode (4) and the side electrode (3) terminals. Refer to «Ignition System Specifications»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-20l-specifications__ignition-system-specifications) . An excessively wide electrode gap can prevent correct spark plug operation. Inspect for the correct spark plug torque. Refer to «Ignition System Specifications»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-20l-specifications__ignition-system-specifications) . Insufficient torque can prevent correct spark plug operation. An over torqued spark plug, causes the insulator (2) to crack. Inspect for signs of tracking that occurred near the insulator tip instead of the center electrode (4). Inspect for a broken or worn side electrode (3). Inspect for a broken, worn, or loose center electrode (4) by shaking the spark plug. A rattling sound indicates internal damage. Inspect for bridged electrodes (3, 4). Deposits on the electrodes (3, 4) reduce or eliminates the gap. Inspect for worn or missing platinum pads on the electrodes (3, 4) If equipped. Inspect for excessive fouling. Inspect the spark plug recess area of the cylinder head for debris. Dirty or damaged threads can cause the spark plug not to seat correctly during installation.

Spark Plug Visual Inspection

  1. Normal operation-Brown to grayish-tan with small amounts of white powdery deposits are normal combustion by-products from fuels with additives.
  2. Carbon Fouled-Dry, fluffy black carbon, or soot caused by the following conditions: Rich fuel mixtures Leaking fuel injectors Excessive fuel pressure Restricted air filter element Incorrect combustion Reduced ignition system voltage output Weak coils Worn ignition wires Incorrect spark plug gap
  3. Excessive idling or slow speeds under light loads can keep spark plug temperatures so low that normal combustion deposits may not burn off. Deposit Fouling-Oil, coolant, or additives that include substances such as silicone, very white coating, reduces the spark intensity. Most powdery deposits will not effect spark intensity unless they form into a glazing over the electrode.

Scheme 27

Scheme 27: Crankshaft Position Sensor Replacement
Scheme 27: Crankshaft Position Sensor Replacement
CalloutComponent Name
1Crankshaft Position Sensor Fastener CAUTION: Refer to Fastener Caution . Tighten 10 N.m (89 lb in)
2Crankshaft Position Sensor Procedure Disconnect the electrical connector.
CAUTION
Refer to Fastener Caution .

Crankshaft Position Sensor Replacement

  1. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .
  2. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/buick/regal/v-2009-2013/remont/mechanical/#engine-mechanical-24l) .
  3. Disconnect the engine wiring harness electrical connector (1) from the intake camshaft position (CMP) sensor.
  4. Remove the intake CMP sensor bolt.
  5. Remove the intake CMP sensor.
  1. Lubricate the intake CMP sensor O-ring seal with clean engine oil.
  2. Install the intake CMP sensor.
  3. Install the intake CMP sensor bolt. Tighten Tighten the bolt to 10 N.m (89 lb in).
  4. Connect the engine wiring harness electrical connector (1) to the intake CMP sensor.
  5. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/buick/regal/v-2009-2013/remont/mechanical/#engine-mechanical-24l) .
  6. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/buick/regal/v-2009-2013/remont/testing-diagnostics/#engine-controlsfuel-24l-repair-instructions) .

Scheme 28

Scheme 28: Camshaft Position Sensor Replacement - Exhaust
Scheme 28: Camshaft Position Sensor Replacement - Exhaust
CalloutComponent Name
Preliminary Procedure Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
1Camshaft Position Sensor Fastener CAUTION: Refer to Fastener Caution . Tighten 10 N.m(89 lb in)
2Camshaft Position Sensor - Exhaust Procedure Lube the O-ring with clean engine oil. Disconnect the electrical connector.
CAUTION
Refer to Fastener Caution .

Camshaft Position Sensor Replacement - Exhaust

Scheme 29

Scheme 29: Camshaft Position Actuator Solenoid Valve Replacement
Scheme 29: Camshaft Position Actuator Solenoid Valve Replacement
CalloutComponent Name
Preliminary Procedure Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement
1Fastener (Qty: 2) CAUTION: Refer to Fastener Caution Tighten 10 N.m (89 lb in)
2Camshaft Position Actuator Solenoid Valve Replacement Procedure Disconnect the camshaft position actuator solenoid valve harness connector. Clean the cylinder head mating surfaces before assembly. Lubricate the camshaft position actuator solenoid valve O-ring seals with clean engine oil. TIP: Replace only the Intake or exhaust camshaft position actuator solenoid as necessary.
CAUTION
Refer to Fastener Caution

Camshaft Position Actuator Solenoid Valve Replacement

Scheme 30

Scheme 30: Knock Sensor Replacement
Scheme 30: Knock Sensor Replacement
CalloutComponent Name
Preliminary Procedure Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection . Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Disconnect and reposition the battery positive cable from the starter. Refer to Starter Replacement (LDK Or LHU) , Starter Replacement (LEA) .
1Knock Sensor Bolt CAUTION: Refer to Fastener Caution . Tighten 28 N.m(18 lb in)
2Knock Sensor Procedure Disconnect the electrical connector.
CAUTION
Refer to Fastener Caution .

Knock Sensor Replacement

Scheme 31

Scheme 31: Flexible Fuel Sensor Replacement
Scheme 31: Flexible Fuel Sensor Replacement
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove fuel feed hose- flex sensor to fuel feed pipe. Refer to Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Pipe) , Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Front Pipe) Remove fuel feed hose- flex sensor to fuel feed front pipe. Refer to Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Pipe) , Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Front Pipe)
1Flexiable Fuel Sensor. Procedure Disconnect the electrical connector. Depress tabs to release sensor.

Flexible Fuel Sensor Replacement

Scheme 32

Scheme 32: Secondary Air Injection Check Valve Replacement
Scheme 32: Secondary Air Injection Check Valve Replacement
CalloutComponent Name
Preliminary Procedure Remove the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement (LAF) .
1Secondary Air Injection Check Valve Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 10 N.m (89 lb in)
2Secondary Air Injection Check Valve Nut (Qty: 2) Tighten 25 N.m (18 lb ft)
3Secondary Air Injection Check Valve Procedure Disconnect the electrical connector.
4Secondary Air Injection Check Valve Gasket
CAUTION
Refer to Fastener Caution .

Secondary Air Injection Check Valve Replacement

Scheme 33

Scheme 33: Secondary Air Injection Check Valve Pipe Replacement
Scheme 33: Secondary Air Injection Check Valve Pipe Replacement
CalloutComponent Name
Preliminary Procedure Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
1Secondary Air Injection Check Valve Pipe Fastener CAUTION: Refer to Fastener Caution . Tighten 22 N.m(16 lb ft).
2Secondary Air Injection Check Valve Pipe Procedure Disconnect the quick connect fittings by squeezing both sides.
CAUTION
Refer to Fastener Caution .

Secondary Air Injection Check Valve Pipe Replacement

Scheme 34

Scheme 34: Secondary Air Injection Pipe Replacement
Scheme 34: Secondary Air Injection Pipe Replacement
CalloutComponent Name
Preliminary Procedure Remove the secondary air injection check valve. Refer to Secondary Air Injection Check Valve Replacement
1Secondary Air Injection Pipe Bolt (Qty: 4) CAUTION: Refer to Fastener Caution . Tighten 10 N.m(89 lb in).
2Secondary Air Injection Pipe
CAUTION
Refer to Fastener Caution .

Secondary Air Injection Pipe Replacement

  1. Disconnect the secondary air injection pump hose (1) from the secondary air injection pump.
  2. Disconnect the secondary air injection pump hose (1) from the secondary air injection check valve.
  3. Remove the secondary air injection pipe from the vehicle.
  1. Connect the secondary air injection pump hose (1) to the secondary air injection check valve.
  2. Install the secondary air injection pump hose to the vehicle.
  3. Connect the secondary air injection pump hose (1) to the secondary air injection pump.

Scheme 35

Scheme 35: Secondary Air Injection Pump Inlet Hose Replacement
Scheme 35: Secondary Air Injection Pump Inlet Hose Replacement
CalloutComponent Name
1Secondary Air Injection Inlet Pump Hose Fastener CAUTION: Refer to Fastener Caution . Tighten 22 N.m(16 lb ft).
2Secondary Air Injection Inlet Pump Hose Procedure Disconnect the quick connect fittings by squeezing both sides.
CAUTION
Refer to Fastener Caution .

Secondary Air Injection Pump Inlet Hose Replacement

Scheme 36

Scheme 36: Secondary Air Injection Pump Replacement
Scheme 36: Secondary Air Injection Pump Replacement
CalloutComponent Name
Preliminary Procedure Disconnect the secondary injection pump hose. Refer to Secondary Air Injection Pump Hose Replacement
1Secondary Air Injection Pump Bolt (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten 30 N.m(22 lb ft).
2Secondary Air Injection Pump
CAUTION
Refer to Fastener Caution .

Secondary Air Injection Pump Replacement

Scheme 37

Scheme 37: Air Cleaner Element Replacement
Scheme 37: Air Cleaner Element Replacement
CalloutComponent Name
1Air Cleaner Element Fasteners CAUTION: Refer to Fastener Caution . Tighten 5 N.m(44 lb in)
2Air Cleaner Element Procedure Disconnect the mass airflow electrical connector.
CAUTION
Refer to Fastener Caution .

Air Cleaner Element Replacement

Scheme 38

Scheme 38: Air Cleaner Assembly Replacement
Scheme 38: Air Cleaner Assembly Replacement
CalloutComponent Name
Preliminary Procedure Remove the mass airflow sensor. Refer to Mass Airflow Sensor with Intake Air Temperature Sensor Replacement . Disconnect the outlet duct from the air cleaner assembly. Refer to Air Cleaner Outlet Duct Replacement .
1Air Cleaner Assembly

Air Cleaner Assembly Replacement

Scheme 39

Scheme 39: Air Cleaner Outlet Duct Replacement
Scheme 39: Air Cleaner Outlet Duct Replacement
CalloutComponent Name
1Air Cleaner Outlet Duct Fastener (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 4 N.m (35 lb in)
2Air Cleaner Outlet Duct with Resonator
CAUTION
Refer to Fastener Caution .

Air Cleaner Outlet Duct Replacement

See also:
• Battery Negative Cable Disconnection and Connection
• Safety Glasses Warning
• Control Module References
• Diagnostic Trouble Code (DTC) List - Vehicle
• Fastener Caution
• Heated Oxygen and Oxygen Sensor Caution
• Adhesives, Fluids, Lubricants, and Sealers
• Lifting and Jacking the Vehicle
• CH-48027-100
• Special Tools (Diagnostic Tools)
• Gasoline/Gasoline Vapors Warning
• Relieving Fuel Pressure Warning
• Rear Compartment Side Trim Panel Replacement (without HP6)
• Fuel Tank Filler Pipe Housing Replacement
• Intake Manifold Cover Replacement
• Fuel Rail and Injectors Cleaning and Inspection (LAF, LEA, or LUK)
• Ignition System Specifications
• Exhaust Manifold Heat Shield Replacement (LAF)
• Air Cleaner Outlet Duct Replacement
• Fuel Pressure Relief
• Fuel Tank Draining (Non E-85)

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