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.
    • Refer to Visual/Physical Checks.

Fuel System

Test the fuel injectors using the following tests:

    • Refer to Fuel Injector Solenoid Coil Test .

Additional Checks

Test for short between B+ and any of the ignition feed circuits.