Engine Controls - Trouble Shooting - No Codes

• Introduction
• Symptom Diagnosis
  • Notes
  • Abnormal Engine Noise
  • A/C Does Not Turn Off During Wide Open Throttle (Wot)
  • Emissions Failure
  • Engine Runs Rough, Misses, Hesitates, Stumbles, Surges Or Stalls During Acceleration Or Cruise, Or Engine Bucks Or Jerks During Acceleration, Cruise Or Deceleration
  • Engine Stalls At Idle Or Just After Starting
  • Engine Vibration
  • Excessive Oil Consumption
  • Exhaust Smoke
  • Fuel ODER In Engine Compartment
  • Hart To Start (Long Cranking, Erratic Cranking Or Erratic Starting)
  • High Idle Or Run-On
  • Knocking Or Pinging During Acceleration Or Cruise
  • Lack Or Loss Of Power During Acceleration Or Cruise
  • Low Idle Or Engine Stalls During Deceleration
  • No Crank
  • No Start (Cranks Normally)
  • Poor Fuel Mileage
  • Rough Or Unstable Idle
  • Slow Return To Idle
  • Sulphur Exhaust Smell
• INTERMITTENTS
  • Intermittent Problem Diagnosis
  • Test Procedures
    • Intermittent Simulation