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Home >> Isuzu >> 2004 >> Ascender S, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (Troubleshooting) - 4.2L >> Engine Controls (Troubleshooting) >> Dieseling, Run-On
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Dieseling, Run-On

Dieseling, Run-On

Inspections Action
DEFINITION: The engine continues to run when you turn the key OFF, but runs very roughly. If the engine runs smoothly, test the ignition switch and adjustment.
Preliminary Refer to Symptoms - Engine Controls  .
Fuel System
  • Inspect the evaporative emission (EVAP) system and fuel tank venting.
  • Inspect the fuel injectors for leakage. Refer to Fuel System Diagnosis 
  • Perform a fuel system diagnosis. Refer to Fuel System Diagnosis  .