Evaporative Emissions Control System Ford Explorer Sport Trac II

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

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

The evaporative emission (EVAP) system consists of the

1. dust separator.
2. EVAP canister.
3. EVAP canister purge valve.
4. fuel vapor vent valve.
5. fuel tank pressure sensor.
6. vapor tubes.
7. vapor hoses.

The EVAP system

1. prevents hydrocarbon emissions from reaching the atmosphere.
2. 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.
3. routes the stored fuel vapors to the engine during engine operation.
4. 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 fill limit vent valve and fuel vapor vent valve. The fuel vapor vent valves are part of the fuel tank assembly and cannot be serviced separately.
2. to the EVAP canisters through a vapor line.
3. to the engine when the EVAP canister purge valve is opened by the PCM.

The fuel tank pressure (FTP) sensor

1. monitors the pressure levels in the fuel tank.
2. communicates the pressure reading to the PCM during the on-board diagnostic (OBD) II leak test.

The EVAP canister

1. is located on top of the fuel tank.
2. contains activated carbon.
3. stores fuel vapors.

The fuel tank filler cap on early build vehicles

1. relieves system vacuum below 3.8 kPa (15.26 in H 2 O).

The 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.

The EVAP canister purge valve

1. is normally closed.
2. regulates the purging of the EVAP canister.
3. is electronically controlled by the PCM.

The dust separator

1. prevents suspended dust and dirt particles from entering the evaporative emission system.
2. is serviced 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 leak test methods to test and activate the EVAP system.
6. has an engine malfunction light that will be displayed by the message center if the EVAP system fails the test.

The EVAP running loss system leak test

1. utilizes intake manifold vacuum to test the system and involves several stages.

Refer to the Introduction - Gasoline Engines article.

Evaporative Emission System Leak Test

Special Tools Illustration Tool Name Tool Number VACUTEC Smoke Machine Fuel EVAP Emissions 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. Using the scan tool, run the evaporative emissions (EVAP) system test.
2. If the EVAP system failed the EVAP system test, proceed to Phase 2.

Phase 2 - System Leak Check

1. Disconnect the upper fuel vapor tube quick connect coupling from the EVAP canister purge valve. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/explorer-sport-trac/ii-2006-2010/remont/fuel-system/#fuel-system-general-information) article.
2. Connect the smoke machine emissions tester to the upper EVAP canister purge valve fitting. For additional information, refer to the manufacturer's instruction.
3. Using the scan tool, energize the EVAP canister purge valve to the open position.
4. Using the scan tool, close the canister vent solenoid.
5. Introduce smoke from the smoke machine emissions tester into the EVAP system. For additional information, refer to the manufacturer's instructions.
6. Use the halogen light provided with the smoke machine emissions tester to look for smoke coming from the EVAP system. This will indicate a leak point.
7. Repair any leaks as necessary.
8. Repeat the leak test until the system passes.

Scheme 7

REMOVAL AND INSTALLATION

Note. Use only water-based lubricants on the vapor hoses.

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING AND LIFTING»(/ford/explorer-sport-trac/ii-2006-2010/remont/hoistjack/#jacking-and-lifting) article.
2. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(/ford/explorer-sport-trac/ii-2006-2010/remont/body-electrical/#battery-mounting-and-cables) article.
3. Disconnect the fuel vapor vent valve electrical connector.
4. Disconnect the fuel vapor hoses from the fuel vapor vent valve and remove the fuel vapor vent valve.
5. To install, reverse the removal procedure. Lubricate the vapor hoses with a water-based lubricant to ease installation. Carry out the Evaporative Emission System Leak Test. For additional information, refer to «Evaporative Emission System Leak Test»(/ford/explorer-sport-trac/ii-2006-2010/remont/auxiliary-emission-control-systems/#evaporative-emissions-control-system__evaporative-emission-system-leak-test) .

Scheme 8

Note. Use only water-based lubricants on the vapor hoses.

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING AND LIFTING»(/ford/explorer-sport-trac/ii-2006-2010/remont/hoistjack/#jacking-and-lifting) article.
2. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(/ford/explorer-sport-trac/ii-2006-2010/remont/body-electrical/#battery-mounting-and-cables) article.
3. Disconnect the fuel vapor hose from the dust separator.
4. Disconnect the fuel filler pipe vapor hose from the dust separator.
5. Remove the bolt and the dust separator. To install, tighten to 9 Nm (80 lb-in).
6. To install, reverse the removal procedure. Lubricate the vapor hoses with a water-based lubricant to ease installation. Carry out the Evaporative Emission System Leak Test. For additional information, refer to «Evaporative Emission System Leak Test»(/ford/explorer-sport-trac/ii-2006-2010/remont/auxiliary-emission-control-systems/#evaporative-emissions-control-system__evaporative-emission-system-leak-test) .

Scheme 9

Note. Use only water-based lubricants on the vapor hoses.

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING AND LIFTING»(/ford/explorer-sport-trac/ii-2006-2010/remont/hoistjack/#jacking-and-lifting) article.
2. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(/ford/explorer-sport-trac/ii-2006-2010/remont/body-electrical/#battery-mounting-and-cables) article.
3. Remove the fuel tank. For additional information, refer to «FUEL TANK AND LINES»(/ford/explorer-sport-trac/ii-2006-2010/remont/fuel-system/#fuel-tank-and-fuel-lines) article.
4. Detach the evaporative emission (EVAP) canister from the fuel tank to gain access to the quick connect coupling.
5. Disconnect the fuel tank pressure (FTP) sensor and tube assembly quick connect coupling from the EVAP canister. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/explorer-sport-trac/ii-2006-2010/remont/fuel-system/#fuel-system-general-information) article.
6. Disconnect the vapor hose from the EVAP canister.
7. Remove the EVAP canister.
8. To install, reverse the removal procedure. Lubricate the vapor hoses with a water-based lubricant to ease installation. Carry out the Evaporative Emission System Leak Test. For additional information, refer to «Evaporative Emission System Leak Test»(/ford/explorer-sport-trac/ii-2006-2010/remont/auxiliary-emission-control-systems/#evaporative-emissions-control-system__evaporative-emission-system-leak-test) .

Scheme 10

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING AND LIFTING»(/ford/explorer-sport-trac/ii-2006-2010/remont/hoistjack/#jacking-and-lifting) article.
2. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(/ford/explorer-sport-trac/ii-2006-2010/remont/body-electrical/#battery-mounting-and-cables) article.
3. Disconnect the evaporative emission (EVAP) canister purge valve electrical connector.
4. Disconnect the 2 vapor tube quick connect couplings from the EVAP canister purge valve. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/explorer-sport-trac/ii-2006-2010/remont/fuel-system/#fuel-system-general-information) article.
5. Detach the EVAP canister purge valve from the bracket and remove.
6. 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/explorer-sport-trac/ii-2006-2010/remont/auxiliary-emission-control-systems/#evaporative-emissions-control-system__evaporative-emission-system-leak-test) .

Scheme 11

1. Remove the evaporative emission (EVAP) canister. For additional information, refer to «Evaporative Emission Canister»(/ford/explorer-sport-trac/ii-2006-2010/remont/auxiliary-emission-control-systems/#evaporative-emissions-control-system) .
2. Remove the fuel tank shield from the fuel tank.
3. Disconnect the fuel tank pressure (FTP) sensor electrical connector.
4. Disconnect the 3 FTP sensor and tube assembly quick connect couplings from the fuel pump module and the vapor vent valves. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/explorer-sport-trac/ii-2006-2010/remont/fuel-system/#fuel-system-general-information) article.
5. Remove the FTP sensor and tube assembly.
6. 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/explorer-sport-trac/ii-2006-2010/remont/auxiliary-emission-control-systems/#evaporative-emissions-control-system__evaporative-emission-system-leak-test) .

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