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LS & Thunderbird

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  1. Testing Fuel Tank Pressure Sensor -  Connect Evaporative Emissions System Leak Tester (134-00056) to fuel filler pipe. Turn ignition on. Using scan tool, close canister vent solenoid. Select OUTPUT TEST MODE, FTP and FTP V PID. Select ALL OFF mode. Press START button on scan tool to close canister vent solenoid. Pressurize system to 14 in. H2O (3.48 kPa). If FTP V PID is not 4.22-4.90 volts, go to step  3. If FTP V PID is 4.22-4.90 volts, go to next step.

  2. Testing Venting Portion Of EVAP System For Blockage

    Using scan tool, open canister vent solenoid. If pressure drops immediately, perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to step  5.

  3. Testing For Fuel Filler Pipe Blockage

    Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, go to next step. If pressure does not drop immediately, replace fuel filler pipe. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed.

  4. Testing Fuel Vapor Control Valve Tube For Pinch Or Blockage

    Reconnect fuel filler pipe to fuel tank. Lower fuel tank about 3/4" (19 mm). Connect EVAP tester to fuel filler pipe. Turn ignition on. Using scan tool, close canister vent solenoid. Select OUTPUT TEST MODE, FTP and FTP V PID. Select ALL OFF mode. Press START button on scan tool to close canister vent solenoid. Pressurize system to 14 in. H2O (3.48 kPa). If FTP V PID is 4.22-4.90 volts, go to step  2. If FTP V PID is not 4.22-4.90 volts, fuel vapor control valve tube or fuel tank vapor control valve is blocked. Remove the fuel tank assembly. Remove the fuel vapor control tube from the tank and inspect it for any blockages or kinks. If the fuel vapor control tube is faulty, install a new one. If the vapor control tube is not restricted, install a new fuel tank assembly. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed.

  5. Isolate Location Of Blockage

    Disconnect fuel vapor control valve tube from EVAP canister purge outlet tube. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, go to next step. If pressure does not drop immediately, fuel vapor control valve tube or fuel tank vapor control valve is blocked. Remove the fuel tank assembly. Remove the vapor control tube from the tank and inspect it for any blockage or kinks. If the fuel vapor control tube is faulty, install a new one. If the fuel vapor control tube is not restricted, install a new fuel tank assembly. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed.

  6. Testing EVAP Canister Vent Solenoid For Blockage

    Reconnect fuel vapor control valve tube from EVAP canister purge outlet tube. Lower differential to access canister vent solenoid. See appropriate DIFFERENTIALS article in DRIVE AXLES. Disconnect canister vent solenoid from canister vent hose. Pressurize system to 14 in. H2O (3.48 kPa). If pressure does not drop immediately, go to next step. If pressure drops immediately, replace canister vent solenoid. Reconnect all components. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed.

  7. Testing Canister Vent Solenoid Hose Assembly For Blockage

    Reinstall differential. Lower rear subframe to access EVAP canister and bracket assembly. Lower EVAP canister and bracket assembly. Disconnect canister vent solenoid hose from 1.0L EVAP canister. See Fig 1. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace canister vent solenoid hose assembly. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to next step.
    Fig 1: Identifying EVAP Canister Hoses (LS & Thunderbird)
    G00014389Courtesy of FORD MOTOR CO.

  8. Testing 1.0L EVAP Canister

    Disconnect fuel vapor storage EVAP canister inlet tube at 1.0L EVAP canister. See Fig 1. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace 1.0L EVAP canister. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to next step.

  9. Testing Fuel Vapor Storage Canister Inlet Tube

    Disconnect fuel vapor storage canister inlet tube from 2.0L EVAP canister. See Fig 1. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace fuel vapor storage canister inlet tube. Reconnect all components. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to next step.

  10. Testing 2.0L EVAP Canister

    Disconnect EVAP canister purge outlet tube at 2.0L EVAP canister. See Fig 1. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace 2.0L EVAP canister. Reconnect all components. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, replace EVAP canister purge outlet tube. Reconnect all components. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed.
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