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Home >> Mazda >> 1999 >> B2500 TL, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Controls - Self-Diagnostics - EEC-V - 6.8L (99S E Series & 99S F350 To F550)) >> System Tests (Evaporative Emissions) >> Test E: Excessive Fuel Odor >> Diagnostic Aids

Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 26 other vehicles, including the 1999 Mercury Tracer, 1999 Mercury Sable, 1999 Mercury Mystique, 1999 Mercury Mountaineer, and 1999 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

Enter this test only when all steps under QUICK TEST have been successfully completed and hiss still exists when fuel cap is opened or if directed here from another test or chart.

  1. Testing Evaporative Emission Running Loss System Monitor -  Perform EVAPORATIVE EMISSIONS REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If any PCM DTCs P0442, P0455, P1443 or P1450 are retrieved, see DIAGNOSTIC TROUBLE CODE (DTC) DEFINITION  table under SYSTEM TESTS for appropriate test procedure. If any other PCM DTCs are retrieved, see DIAGNOSTIC TROUBLE CODE (DTC) DEFINITION  for appropriate test procedure. If no PCM DTCs are retrieved, go to next step.

  2. Testing Evaporative Emissions Test Port Through Canister Vent Solenoid

    Connect Evaporative Emissions System Leak Tester (134-00056) or equivalent to test port. Pressurize system to 3.48 kPa (14 In. H2O). If pressure drops immediately, perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform EVAPORATIVE EMISSIONS REPAIR VERIFICATION DRIVE CYCLE then go to next step. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If pressure does not drop immediately, go to TEST D .

  3. Testing EVAP System Between Fuel Tank & EVAP Canister

    Move EVAP Tester to fuel filler pipe. Pressurize system to 3.48 kPa (14 In. H2O). If pressure drops immediately, perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform EVAPORATIVE EMISSIONS REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If pressure does not drop immediately, go to next step.

  4. Testing EVAP Canister Tube Or Fuel Vapor Vent Valve

    Disconnect fuel vapor vent valve from EVAP canister tube. Pressurize system to 3.48 kPa (14 In. H2O). If pressure drops immediately, replace fuel vapor tubes between fuel tank and EVAP canister and/or EVAP canister tube. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform EVAPORATIVE EMISSIONS REPAIR VERIFICATION DRIVE CYCLE. See DRIVE CYCLES  under ADDITIONAL SYSTEM FUNCTIONS. If pressure does not drop immediately, replace fuel vapor vent 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 CYCLES  under ADDITIONAL SYSTEM FUNCTIONS.
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