Evaporative Emissions System Ford Taurus X I

Material

Material

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

Note. The vehicle emission vacuum routing diagrams are contained in the Description and Operation subsection of the Engine Emissions Control part. Refer to ENGINE EMISSION CONTROL article.

The Evaporative Emission (EVAP) system consists of the

1. EVAP canister purge valve.
2. EVAP canister.
3. EVAP canister vent solenoid.
4. fuel vapor tube assembly (includes the Fuel Tank Pressure (FTP) sensor).
5. dust separator.
6. fuel tank filler cap.

The EVAP system

1. utilizes an On-Board Refueling Vapor Recovery (ORVR) system that captures the fuel vapors from the vehicles fuel tank during refueling.
2. prevents hydrocarbon emissions from reaching the atmosphere.
3. stores fuel vapors in the EVAP canister that are generated during vehicle operation or hot soak, until they can be consumed by the engine during normal engine operation.
4. routes the stored fuel vapors to the engine during engine operation.
5. is controlled by the PCM which, using various sensor inputs, calculates the desired amount of purge flow. The PCM regulates the purge flow, induced by the application of intake manifold vacuum, by varying the duty cycle applied to the EVAP canister purge valve.

The fuel vapors are routed

1. from the fuel tank through the fuel vapor vent valve.
2. to the EVAP canisters through the fuel vapor tube assembly.
3. to the engine when the EVAP canister purge valve is opened by the PCM.

FTP sensor

1. is part of the fuel vapor tube assembly.
2. monitors the pressure levels in the fuel tank.
3. communicates the pressure reading to the PCM during the OBD II leak test.

The fuel vapor tube assembly

1. structure varies to correspond with emission levels (Federal or Partial Zero Emissions Vehicle (PZEV)) and fuel tank design (L-shaped or saddle-type).
2. is located on the top RH side of the fuel tank.
3. is used to control the flow of fuel vapors entering the EVAP system.

The EVAP canister

1. is located midship under the RH side of the vehicle.
2. contains activated carbon.
3. stores fuel vapors.

The fuel tank filler cap

1. relieves system vacuum below -3.5 kPa (-16.00 H 2 O).

The EVAP canister vent solenoid

1. is normally open.
2. seals the EVAP system for the inspection and maintenance (I/M 240) test and OBD II leak and pressure tests.
3. is mounted into the dust separator.
4. is repaired as a separate item.

The EVAP canister purge valve

1. is normally closed.
2. regulates the purging of the EVAP canisters.
3. is controlled by the PCM.
4. is repaired as a separate item.
5. is mounted on the RH strut tower.

The EVAP dust separator

1. is attached to the EVAP canister.
2. prevents suspended dust and dirt particles from entering the EVAP system.
3. is repaired as a separate item.

The EVAP system monitor

1. is a self-test strategy within the PCM which tests the integrity of the EVAP system.
2. monitors the EVAP system for leaks.
3. monitors electronic EVAP components for irrationally high or low voltages.
4. monitors for correct EVAP system operation.
5. uses negative and positive leak test methods to test and activate the EVAP system.

The engine ON EVAP leak-check monitor

1. is executed by the individual components of the enhanced EVAP system. Intake manifold vacuum is utilized to reach a target vacuum on the EVAP system. The FTP sensor is used by the engine ON EVAP leak-check monitor to determine if the target vacuum necessary to carry out the leak-check on the EVAP system has been reached. Once target vacuum on the EVAP system is achieved, the change in EVAP system vacuum over a calibrated period of time determines if a leak exists.

The Engine Off Natural Vacuum (EONV) EVAP leak-check monitor is executed

1. once the engine ON EVAP leak-check monitor is completed and the key is turned OFF. The EONV EVAP leak-check monitor determines if a leak is present when the naturally occurring change in the fuel tank pressure or vacuum does not exceed a calibrated limit during a calibrated amount of time. A separate, low-power consuming microprocessor in the PCM manages the EONV leak-check. The engine OFF EVAP leak-check monitor is executed by the individual components of the enhanced EVAP system.

Refer to the Introduction - Gasoline Engines article.

Evaporative Emission System Leak Test

Special Tools Illustration Tool Name Tool Number VACUTEC Smoke Machine Fuel Evaporative Emission System Tester 218-0002 or equivalent Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool

Scheme 5

Scheme 6

Phase 1 - Leak Verification

1. Run the EVAP Test with the scan tool.
2. If the Evaporative Emission (EVAP) system failed the EVAP Test, proceed to Phase 2.

Phase 2 - System Leak Check

1. Disconnect the upper vapor tube-to-EVAP canister purge valve quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/taurus-x/i-2007-2009/remont/fuel-system/#fuel-system-general-information) article.
2. Connect the VACUTEC Smoke Machine Fuel Evaporative Emission System Tester to the upper EVAP canister purge valve fitting. For additional information, refer to the manufacturer's instructions.
3. Connect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(/ford/taurus-x/i-2007-2009/remont/body-electrical/#battery-mounting-and-cables) article.
4. Open the EVAP canister purge valve with the scan tool.
5. Close the canister vent solenoid with the scan tool.
6. Carefully turn the fuel tank filler cap counterclockwise until the thread disengages and position aside.
7. Introduce smoke from the VACUTEC Smoke Machine Fuel Evaporative Emission System Tester into the EVAP system and verify that smoke is exiting the fuel tank filler pipe neck area. For additional information, refer to the manufacturer's instructions.
8. Install the fuel tank filler cap once smoke is observed exiting the fuel tank filler pipe neck area.
9. Continue to enter smoke into the system for 60 seconds to obtain pressure.
10. Press and release the remote start button in intervals of 15 seconds ON and 15 seconds OFF while checking for exiting smoke.
11. Use the halogen light provided with the VACUTEC Smoke Machine Fuel Evaporative Emission System Tester to follow the EVAP system path and look for smoke exiting at the source of the leak(s).
12. Repair any leaks as necessary.
13. Repeat the leak test until the system passes.

Scheme 7

REMOVAL AND INSTALLATION

1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(/ford/taurus-x/i-2007-2009/remont/body-electrical/#battery-mounting-and-cables) article.
2. Disconnect the Evaporative Emission (EVAP) canister purge valve electrical connector.
3. Disconnect the vapor tube-to-EVAP canister purge valve inlet and outlet quick connect couplings. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/taurus-x/i-2007-2009/remont/fuel-system/#fuel-system-general-information) article.
4. Depress the retaining tab to release and remove the EVAP canister purge valve from the bracket.
5. To install, reverse the removal procedure. Carry out the Evaporative Emission System Leak Test. For additional information, refer to «Evaporative Emission System Leak Test»(/ford/taurus-x/i-2007-2009/remont/auxiliary-emission-control-systems/#evaporative-emissions-system__evaporative-emission-system-leak-test) .

Scheme 8

1. For additional information, refer to the procedures.

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING AND LIFTING»(/ford/taurus-x/i-2007-2009/remont/hoistjack/#jacking-and-lifting) article.
2. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(/ford/taurus-x/i-2007-2009/remont/body-electrical/#battery-mounting-and-cables) article.
3. Disconnect the EVAP canister vent solenoid electrical connector.
4. Disconnect the fuel vapor tube-to-EVAP canister quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/taurus-x/i-2007-2009/remont/fuel-system/#fuel-system-general-information) article.
5. Disconnect the fuel vapor tube assembly-to-EVAP canister quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/taurus-x/i-2007-2009/remont/fuel-system/#fuel-system-general-information) article.
6. Disconnect the fresh air hose-to-dust separator.
7. Remove the 4 EVAP canister nuts. To install, tighten to 9 Nm (80 lb-in).
8. Remove the rivet and the EVAP canister.
9. To install, reverse the removal procedure. Carry out the Evaporative Emission System Leak Test. For additional information, refer to «Evaporative Emission System Leak Test»(/ford/taurus-x/i-2007-2009/remont/auxiliary-emission-control-systems/#evaporative-emissions-system__evaporative-emission-system-leak-test) .

Dust Separator

Material

1. Remove the Evaporative Emission (EVAP) canister. For additional information, refer to «Evaporative Emission Canister»(/ford/taurus-x/i-2007-2009/remont/auxiliary-emission-control-systems/#evaporative-emissions-system) .
2. Depress the locking tab outward, rotate the EVAP canister vent solenoid clockwise and remove it from the dust separator. Apply clean engine oil to the EVAP canister vent solenoid O-ring seal upon installation.
3. Release the 3 retaining tabs and remove the dust separator.
4. To install, reverse the removal procedure.

Evaporative Emission Canister Vent Solenoid

Material

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING AND LIFTING»(/ford/taurus-x/i-2007-2009/remont/hoistjack/#jacking-and-lifting) article.
2. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(/ford/taurus-x/i-2007-2009/remont/body-electrical/#battery-mounting-and-cables) article.
3. Disconnect the EVAP canister vent solenoid electrical connector.
4. Depress the locking tab outward, rotate the EVAP canister vent solenoid clockwise and remove it from the dust separator. Apply clean engine oil to the EVAP canister vent solenoid O-ring seal upon installation.
5. To install, reverse the removal procedure. Carry out the Evaporative Emission System Leak Test. For additional information, refer to «Evaporative Emission System Leak Test»(/ford/taurus-x/i-2007-2009/remont/auxiliary-emission-control-systems/#evaporative-emissions-system__evaporative-emission-system-leak-test) .

Scheme 9

Scheme 10

Scheme 11

Scheme 12

All vehicles

1. Remove the fuel tank. For additional information, refer to «FUEL TANK AND LINES»(/ford/taurus-x/i-2007-2009/remont/fuel-system/#fuel-tank-and-fuel-lines) article.
2. Disconnect the Fuel Tank Pressure (FTP) sensor electrical connector.
3. Disconnect the fuel vapor tube assembly-to-Fuel Pump (FP) module quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/taurus-x/i-2007-2009/remont/fuel-system/#fuel-system-general-information) article.
4. Disconnect the fuel vapor tube assembly-to-FP module quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/taurus-x/i-2007-2009/remont/fuel-system/#fuel-system-general-information) article.
5. Disconnect the fuel vapor tube assembly-to-safety valve quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/taurus-x/i-2007-2009/remont/fuel-system/#fuel-system-general-information) article.
6. Disconnect the fuel vapor tube assembly-to-fuel level sensor quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/taurus-x/i-2007-2009/remont/fuel-system/#fuel-system-general-information) article.
7. Release the retainer clips and remove the fuel vapor tube assembly.
8. To install, reverse the removal procedure. Carry out the Evaporative Emission System Leak Test. For additional information, refer to «Evaporative Emission System Leak Test»(/ford/taurus-x/i-2007-2009/remont/auxiliary-emission-control-systems/#evaporative-emissions-system__evaporative-emission-system-leak-test) .

See also:
• ENGINE EMISSION CONTROL
• Introduction - Gasoline Engines
• FUEL SYSTEM - GENERAL INFORMATION
• BATTERY, MOUNTING AND CABLES
• JACKING AND LIFTING
• FUEL TANK AND LINES
• Evaporative Emission System Leak Test
• Evaporative Emission Canister