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 Symptoms , Important Preliminary Checks Before Starting.
    • Search for any bulletins.
    • Verify that the PCM grounds are clean, tight, and in the correct locations.

Fuel System

Check for the following conditions:

    • Any leaking fuel injectors
    • The presence of fuel in the fuel pressure regulator vacuum line