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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Self-Diagnostics - EEC-V - CNG, Flex-Fuel & Gasoline >> System Tests (Evaporative Emissions) >> Test C: DTC P1450: Excessive Vacuum Detected In Fuel Tank >> All Other Models

All Other Models

  1. Check For Visual Cause Of Excessive Fuel Tank Vacuum -  Check for kinks or bends in fuel vapor hoses and tubes. Inspect EVAP canister inlet port, canister vent solenoid filter or outlet hose for contamination or foreign material. Check canister vent solenoid for blockage or contamination. If any conditions are present, repair or clean as necessary and go to next step. If no conditions are present, go to next step.

  2. Check For Blockage Between EVAP Canister Vent Solenoid & EVAP Test Port

    Disconnect and plug EVAP return tube at intake manifold. Connect Evaporative Emissions System Leak Tester (134-00056) or equivalent to EVAP test port. Pressurize system to 3.48 kPa (14 In. H2O). If pressure drops immediately, go to next step. If pressure does not drop immediately, go to TEST D .

  3. Check For Blockage Between Fuel Filler Pipe & EVAP Test Port Or Fuel Vapor "T" Fitting

    Move EVAP Tester to fuel filler pipe. Pressurize system to 3.48 kPa (14 In. H2O). Remove fuel filler cap. If pressure drops immediately, go to next step. If pressure does not drop immediately, go to TEST D .

  4. Check For Fuel Tank Pressure Sensor PID Without Pressure Applied

    On Sable and Taurus, disconnect fuel vapor tube from EVAP canister. On all other models, disconnect EVAP canister outlet tube at EVAP canister. Using scan tool, access PCM PID FTP V. Record reading. If PCM PID FTP V is 2.40-2.80 volts, go to next step. If PCM PID FTP V is not as specified, go to TEST HX  under SYSTEM TESTS.

  5. Check for Stuck Open EVAP Canister Purge Valve At Idle

    On Sable and Taurus, reconnect fuel vapor tube from EVAP canister. On all other models, reconnect EVAP canister outlet tube. Remove plug from EVAP return tube and reconnect tube to intake manifold. Ensure fuel filler cap is properly installed. Access PCM PIDs FTP V and EVAPPDC. Start engine and allow to idle. If when EVAPPDC PID is zero, FTP V PID is less than 2.40 volts, replace EVAP canister purge valve. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform EVAPORATIVE EMISSIONS REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLE PROCEDURES  under ADDITIONAL SYSTEM FUNCTIONS. If when EVAPPDC PID is zero, FTP V PID is 2.40 volts or more, perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform EVAPORATIVE EMISSIONS REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLE PROCEDURES  under ADDITIONAL SYSTEM FUNCTIONS.
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