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 engine runs smooth, check the ignition switch and adjustment.

Preliminary Checks

    • Refer to Important Preliminary Checks Before Starting in Symptoms - Engine Controls .
    • Refer to Visual/Physical Checks in Symptoms - Engine Controls .
    • Search for bulletins.

Fuel System

Check the fuel injectors. Refer to Fuel Injector Solenoid Coil Test .

Additional Checks

Check for a short between battery positive and any of the ignition feed circuits. Refer to Power Distribution Schematics in Wiring Systems .