GM Service Manual Online
For 1990-2009 cars only

Checks

Action

DEFINITON: The engine continues to run when turn the key OFF, but runs very roughly. If the engine runs smoothly, check the ignition switch and adjustment.

Preliminary Check

Refer to Symptoms .

Fuel System Checks

    • Check the Evaporative Emission (EVAP) system and fuel tank venting.
    • Check the fuel injector(s) for leakage.
    • Perform a fuel system diagnosis. Refer to Fuel System Diagnosis .