Dieseling/Run on

SYMPTOM DESCRIPTION:

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



SYSTEM OR COMPONENT TO CHECK ACTION

FUEL CHECK: ^ INJECTOR LEAKAGE:
Hookup a fuel pressure gauge,
remove and block off return line and
power up fuel pump (engine OFF).
Fuel pressure should stabilize and
remain constant.
Energize each injector individually and note rate
of pressure drop. The drop rate should be
balanced across all injectors.
^ IDLE SPEED: Idle speed high.






EMISSIONS CHECK: ^ EVAPORATIVE: Purge
valve and fuel tank venting