GM Service Manual Online
For 1990-2009 cars only

Checks

Action

DEFINITION: Engine continues to run when turning the ignition OFF, but runs very roughly. If the engine runs smoothly, check the ignition switch and adjustment.

Preliminary Check

Refer to Powertrain On Board Diagnostic (OBD) System Check .

Refer to Symptoms .

Fuel System Checks

    • Check the Evaporative Emission (EVAP) control system. Refer to Exhaust Gas Recirculation (EGR) System Diagnosis .