Fuel System - General Information Lincoln Town Car III рестайлинг

GENERAL SPECIFICATIONS

GENERAL SPECIFICATIONS

The fuel system consists of the following components

1. Fuel filter
2. Fuel injectors
3. Fuel level sensor and pump
4. Fuel rail
5. Fuel tank
6. Inertia fuel shutoff (IFS) switch
7. Fuel rail pressure and temperature sensor

The vehicle

1. is equipped with a multi-port fuel injection system.
2. uses separately controlled fuel injectors mounted to the intake manifold for each cylinder.
3. is equipped with fuel injectors that are supplied with pressurized fuel from the fuel pump through the fuel rail.
4. has a fuel rail which is equipped with a fuel rail pressure and temperature sensor.

Special Tools Illustration Tool Name Tool Number Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool ST2834-A

Scheme 6

Principles of Operation

Note. The following procedure diagnoses a slow to fill concern only. For all other concerns refer to the Introduction - Gasoline Engines article.

The fuel tank filler pipe assembly is used to refuel the vehicle. The fuel tank filler pipe check valve prevents spitback of fuel during and after refueling. The fuel tank stores the fuel. The fuel tank contains a fuel pump (FP) module. The FP module consists of a fuel level sensor and a FP. The fuel level sensor sends a signal to the fuel gauge informing the driver of how much fuel is in the fuel tank. The FP module provides fuel to the fuel tubes which supply the fuel rail.

During refueling, the fuel tank vents to the atmosphere through the vent and filler pipes, on vehicles without on-board refueling vapor recovery (ORVR) systems. In vehicles equipped with ORVR the fuel tank and filler pipe are designed so that when the vehicle is being refueled, fuel vapors in the fuel tank travel to the evaporative emission (EVAP) canister, which absorbs the fuel vapors and vents the pressure from the fuel tank during refueling.

Inspection and Verification

1. Verify the customer's concern by refueling the vehicle and observe the fuel fill rate.
2. Inspect to determine if any of the following mechanical concerns apply. VISUAL INSPECTION CHART Mechanical Bent, kinked or damaged fuel tank filler pipe Bent, kinked or damaged fuel tank filler pipe vent tube (if equipped) Incorrect routing of the fuel tank filler pipe Incorrect routing of the fuel tank filler pipe vent tube (if equipped) Incorrect position of fuel tank filler pipe clamps Incorrect position of fuel tank filler pipe vent tube clamps (if equipped) Fuel tank mounted vapor tubes bent or damaged Evaporative emission (EVAP) system tubes or hoses bent or damaged Accident damage to the fuel tank Accident damage to the vehicle effecting the fuel tank filler pipe-to-body connection Unauthorized modifications and/or alterations to the vehicle EVAP system fresh air tube plugged (dirt, spider webbing)
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
5. If the scan tool does not communicate with the VCM: check the VCM connection to the vehicle. check the scan tool connection to the VCM. refer to «MODULE COMMUNICATIONS NETWORK»(/lincoln/town-car/iii-2003-2011/remont/communication-devices/#module-communications-network-system) article, No Power To The Scan Tool, to diagnose no communication with the scan tool.
6. If the scan tool does not communicate with the vehicle: verify the ignition key is in the ON position. verify the scan tool operation with a known good vehicle. refer to «MODULE COMMUNICATIONS NETWORK»(/lincoln/town-car/iii-2003-2011/remont/communication-devices/#module-communications-network-system) article to diagnose no response from the powertrain control module (PCM).
7. Carry out the network test. If the scan tool responds with no communication for one or more modules, refer to «MODULE COMMUNICATIONS NETWORK»(/lincoln/town-car/iii-2003-2011/remont/communication-devices/#module-communications-network-system) article. If the network test passes, retrieve and record continuous memory diagnostic trouble codes (DTCs).
8. Clear the continuous DTCs and carry out the self-test diagnostics for the evaporative emission (EVAP) system.
9. If the DTCs retrieved are related to the concern, go to «Evaporative Emission System Diagnostic Trouble Code Chart»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-system-general-information__evaporative-emission-system-diagnostic-trouble-code) . For PCM related DTCs, refer to the «Introduction - Gasoline Engines»(/lincoln/town-car/iii-2003-2011/remont/testing-diagnostics/#engine-controls-introduction-except-diesel-hybrid) article. For all other DTCs, refer to «MULTIFUNCTION ELECTRONIC MODULES»(/lincoln/town-car/iii-2003-2011/remont/communication-devices/#multifunction-electronic-modules-system) article.
10. If no DTCs related to the concern are retrieved, go to «Symptom Chart»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-system-general-information) .

Evaporative Emission System Diagnostic Trouble Code Chart

DTC INDEX

Symptom Chart

SYMPTOM CHART

Normal Operation

Under normal operation, fuel should flow at a steady rate through the fuel tank filler pipe into the fuel tank. As fuel enters the fuel tank air is vented through the filler pipe or the on-board refueling vapor recovery (ORVR) system.

Possible Causes

1. Fuel tank filler pipe vent tube, if equipped
2. Fuel tank filler pipe
3. Evaporative emission (EVAP) system
4. Fuel tank filler pipe check valve (part of the fuel tank filler pipe assembly)
5. Fill limiting vent valve, (mounted on the fuel tank)

PINPOINT TEST A: SLOW TO FILL

1. A1 CARRY OUT INSPECTION AND VERIFICATION Carry out inspection and verification. Was the cause of the concern found? YES : REPAIR or INSTALL new components to correct the concern. NO : Go to A2 .
2. A2 CHECK THE SYSTEM FOR ANY EVAPORATIVE EMISSION (EVAP) DTCs Connect the scan tool. Check the system for any of the following EVAP DTCs: P0446, P0451, P0452, P0453, P0454, P1443, P1450, P1451 and P260F. Are any of these DTCs present? YES : REFER to «Introduction - Gasoline Engines»(/lincoln/town-car/iii-2003-2011/remont/testing-diagnostics/#engine-controls-introduction-except-diesel-hybrid) article to diagnosis the EVAP system. NO : Go to A3 .
3. A3 MONITOR THE FUEL TANK PRESSURE (FTP) WHILE FILLING THE FUEL TANK Monitor the fuel tank pressure (FTP) reference value while filling the fuel tank. REFER to «Introduction - Gasoline Engines»(/lincoln/town-car/iii-2003-2011/remont/testing-diagnostics/#engine-controls-introduction-except-diesel-hybrid) article. Is FTP within specification? YES : Go to A5 . NO : Go to A4 .
4. A4 MONITOR THE FTP WHILE FILLING THE FUEL TANK WITH THE EVAP SYSTEM DISCONNECTED Disconnect the fuel tank-to-EVAP canister quick connect coupling at the EVAP canister. Refer to «Quick Connect Coupling»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-system-general-information__quick-connect-coupling) in this article. Monitor the FTP reference value while filling the fuel tank. REFER to «Introduction - Gasoline Engines»(/lincoln/town-car/iii-2003-2011/remont/testing-diagnostics/#engine-controls-introduction-except-diesel-hybrid) article. Is FTP within specification? YES : INSPECT the EVAP system for blockage or restrictions. REPAIR the blockage or restriction. If the blockage or restriction cannot be repaired, INSTALL new EVAP system components. NO : Go to A5 .
5. A5 CHECK THE FUEL TANK FILLER PIPE ASSEMBLY FOR BLOCKAGE OR RESTRICTION Remove the fuel tank filler pipe assembly. REFER to «FUEL TANK AND LINES»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-tank-and-fuel-lines) article. Inspect the fuel tank filler pipe and fuel tank filler pipe vent tube (if equipped) for a blockage or restriction. Is the fuel tank filler pipe or fuel tank filler pipe vent tube (if equipped) blocked or restricted? YES : If possible, REPAIR the blockage or restriction. If the blockage or restriction cannot be repaired, INSTALL a new fuel tank filler pipe or fuel tank filler pipe vent tube. NO : Go to A6 .
6. A6 CHECK TO MAKE SURE THAT THE FILL LIMITING VENT VALVE IS FUNCTIONING CORRECTLY NOTE: The fill limiting vent valve, is mounted externally on the fuel tank. Remove the fill limiting vent valve. Refer to «EVAPORATIVE EMISSIONS»(/lincoln/town-car/iii-2003-2011/remont/auxiliary-emission-control-systems/#evaporative-emissions) article. Invert the fill limiting vent valve. Listen for a clicking noise in both directions. Was a clicking noise witnessed? YES : Fill limiting vent valve is OK. Retest the system for normal operation. NO : INSTALL a new fill limiting vent valve. REFER to «EVAPORATIVE EMISSIONS»(/lincoln/town-car/iii-2003-2011/remont/auxiliary-emission-control-systems/#evaporative-emissions) article.

Fuel System Pressure Release

1. Remove the fuel pump fuse.
2. Start the engine and allow it to idle until it stalls.
3. After the engine stalls, crank the engine for approximately 5 seconds to make sure the fuel injection supply manifold pressure has been released.
4. Turn the ignition switch to the OFF position.
5. When fuel system service is complete, install the fuel pump fuse.
6. Cycle the ignition key and wait 3 seconds to pressurize the fuel system. Check for leaks before starting the engine.
7. Start the vehicle and check the fuel system for leaks.

Fuel Tank Draining

Special Tools Illustration Tool Name Tool Number Fuel Storage Tanker 164-R3202 or equivalent

Note. The fuel tank filler pipe must be removed for fuel tank draining due to the installation of a spark arrestor internally mounted in the fuel tank filler pipe. This will not allow a drain tube to pass into the fuel tank for draining purposes.

1. Remove the fuel tank filler pipe. For additional information, refer to «FUEL TANK AND LINES»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-tank-and-fuel-lines) article.
2. Insert a suitable fuel drain tube into the fuel tank.
3. Attach the fuel storage tanker to the fuel drain tube and extract the fuel from the fuel tank.

Spring Lock Couplings

Special Tools Illustration Tool Name Tool Number Disconnect Tool, Spring Lock Coupling (3/8 Inch, Yellow) 310-D004 (D87L-9280-A) or equivalent

Material Specification

Disconnect and Connect

1. Release the fuel system pressure. For additional information, refer to «Fuel System Pressure Release»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-system-general-information__fuel-system-pressure-release) in this article.
2. Remove the fuel tube clip.
3. Install the disconnect tool.
4. Close and push the disconnect tool into the open side of the cage.
5. Separate the fitting.
6. To connect, reverse the disconnect procedure. Inspect and clean both the coupling ends. Lubricate the O-ring seals with clean engine oil.

Quick Connect Coupling

Material Specification

Disconnect - Type I

1. If disconnecting a liquid fuel tube quick connect coupling, release the fuel system pressure. For additional information, refer to «Fuel System Pressure Release»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-system-general-information__fuel-system-pressure-release) in this article.
2. Disconnect the quick connect coupling from the tube. Press the quick connect coupling release button and separate the quick connect coupling from the tube.

Connect - Type I

1. Connect the quick connect coupling onto the tube until fully seated.

Disconnect - Type II

1. Disconnect the lock tab on the connector.
2. Separate the connector from the fitting.

Connect - Type II

1. Connect the lock tab and install the connector onto the fitting.
2. Place the lock tab into the LATCHED position.

See also:
• FUEL PRESSURE SPECIFICATIONS
• Introduction - Gasoline Engines
• MODULE COMMUNICATIONS NETWORK
• MULTIFUNCTION ELECTRONIC MODULES
• FUEL TANK AND LINES
• EVAPORATIVE EMISSIONS
• Evaporative Emission System Diagnostic Trouble Code Chart
• Symptom Chart
• Pinpoint Test A
• Quick Connect Coupling
• Fuel System Pressure Release