Engine Control System Troubleshooting - No Codes

• Introduction
• Preliminary Inspection
• Symptoms
  • Notes
  • Symptom Diagnosis
  • Cuts Out, Misses
    • Symptom Definition
    • Possible Cause & Correction
  • Detonation/Spark Knock
    • Symptom Definition
    • Possible Cause & Correction
  • Engine Backfires
    • Symptom Definition
    • Possible Cause & Correction
  • Engine Dieseling/Run-On
    • Symptom Definition
    • Possible Cause & Correction
  • Hard Start
    • Symptom Definition
    • Possible Cause & Correction
  • Hesitation, Sag Or Stumble
    • Symptom Definition
    • Possible Cause & Correction
  • Lack Of Power, Sluggish Or Spongy
    • Symptom Definition
    • Possible Cause & Correction
  • Poor Fuel Economy
    • Symptom Definition
    • Possible Cause & Correction
  • Poor Fuel Fill Quality
    • Symptom Definition
    • Possible Cause & Correction
    • Cause & Correction
  • Rough, Unstable Or Incorrect Idle & Stalling
    • Symptom Definition
    • Possible Cause & Correction
  • Vehicle Surges Or CHUGGLES
    • Symptom Definition
    • Possible Cause & Correction
• INTERMITTENTS
  • Notes
  • Preliminary
  • Harness Or Connector INTERMITTENTS
  • Electrical Connections Or Wiring
  • Control Module Power & Grounds, & Component Power & Grounds
  • Temperature Sensitivity
  • Electromagnetic Interference (EMI) & Electrical Noise
  • Incorrect Pcm Programming
  • Duplicating Failure Conditions
  • Scan Tool Snapshot
  • Vehicle Data Recorder