Dieseling/Run-On

DEFINITION
Engine continues to run after the ignition switch is turned to the "OFF" position, but runs very roughly. If engine runs smoothly, check ignition switch and adjustment.

PRELIMINARY CHECKS
- Perform the careful "Visual And Physical Checks" in Preliminary Checks. Testing and Inspection

FUEL SYSTEM
- Check fuel injectors for leaking.
Refer to Chart A-7B Fuel System Pressure Check. Chart A-7B Fuel System Pressure Check

Refer to On-Board Diagnostic System Check. Testing and Inspection

- Check for excessive fuel additives (high percent of alcohols).
Refer to Fuel Delivery and Air Induction / System Diagnosis / Procedures.