Engine Controls - Tests W/O Codes

• Introduction
• Symptoms
  • Symptom Diagnosis
  • Difficult To Start/No Start (Engine Will Not Crank Or Cranks Slowly)
  • Difficult To Start/No Start (Cranks Okay)
  • Engine Stalls Often
  • Engine Stalls Occasionally
  • Rough Idle/Missing
  • High Idle Speed (No Drop)
  • Engine Backfires (Lean Fuel Mixture)
  • Muffler Explosion (Rich Fuel Mixture)
  • Engine Hesitates/Poor Acceleration
• INTERMITTENTS
  • Intermittent Problem Diagnosis
  • Test Procedures
    • Intermittent Simulation
  • Vibration Method
    • Wiring Harness Testing
    • Component, Relay & Sensor Testing
    • Electrical Connector Testing
  • Heat Method
  • Humidity Method
  • Electrical Load Method