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, inspect the ignition switch and adjustment.

Preliminary Checks

    • Refer to Symptoms - Engine Controls , Important Preliminary Checks Before Starting.
    • Search for any bulletins.
    • Verify that the powertrain control module (PCM) grounds are clean, tight, and in the correct locations.

Fuel System

Inspect for the following conditions:

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