Symptom Definition

Engine continues to run (but very rough) after ignition is turned off. If engine runs smoothly, check ignition switch.

Possible Causes & Corrections: 

• Check engine for overheating.
• Check canister purge system staying on.
• Check for leaking injectors.
• Check IAC system. See DIAGNOSTIC AIDS in DTC 35 chart in appropriate TESTS W/CODES article in the ENGINE PERFORMANCE section below.
• TESTS W/CODES - 4.3L
• TESTS W/CODES - 5.0L
• TESTS W/CODES - 5.7L
• TESTS W/CODES - 7.4L