GM Service Manual Online
For 1990-2009 cars only

Checks

Action

DEFINITION: Engine continues to run after key is turned OFF, but runs very rough. If the engine runs smooth, check the ignition switch and the ignition switch adjustment.

Preliminary Checks

    • Refer to Important Preliminary Checks Before Starting in Symptoms - Engine Controls .
    • Search for bulletins.
    • Check the PCM grounds for being clean, tight, and in the proper locations. Refer to Engine Controls Schematics .

Fuel System

Inspect the injectors for a leaking condition. Refer to Fuel System Diagnosis for the proper procedure.