Engine Controls - Trouble Shooting - No Codes

• Introduction
• Preliminary Inspection
• Symptoms
  • Notes
  • Symptom Diagnosis
  • Cuts Out, Misses
    • Symptom Definition
    • Sensor/System
    • Fuel System
    • Ignition System
    • Engine Mechanical
    • Additional
  • Detonation/Spark Knock
    • Symptom Definition
    • Fuel System
    • Ignition System
    • Engine Cooling System
    • Engine Mechanical
    • Additional
  • Engine Backfires
    • Symptom Definition
    • Fuel System
    • Sensor/System
    • Ignition System
    • Engine Cooling System
    • Engine Mechanical
    • Additional Checks
  • Engine Dieseling/Run-On
    • Symptom Definition
    • Fuel System
    • Additional Checks
  • Hard Start
    • Symptom Definition
    • Sensor/System
    • Fuel System
    • Ignition System
    • Engine Mechanical
  • Hesitation, Sag Or Stumble
    • Symptom Definition
    • Sensor/System
    • Fuel System
    • Ignition System
    • Engine Cooling System
    • Additional
  • Lack Of Power, Sluggish Or Spongy
    • Symptom Definition
    • Sensor/System
    • Fuel System
    • Ignition System
    • Engine Mechanical
    • Additional Checks
  • Poor Fuel Economy
    • Symptom Definition
    • Fuel System
    • Sensor/System
    • Ignition System
    • Engine Cooling System
    • Engine Mechanical
    • Additional Checks
  • Poor Fuel Fill Quality
    • Difficult To Fill
    • Over Fill
    • Pre-Mature Shut Off Of Fuel Dispensing Nozzle
    • Fuel Spitback
    • Liquid To EVAP Canister
    • Liquid Fuel Leak
    • Fuel Odor
  • Rough, Unstable Or Incorrect Idle & Stalling
    • Symptom Definition
    • Fuel System
    • Sensor/System
    • Ignition System
    • Engine Mechanical
    • Additional Checks
  • Vehicle Surges Or CHUGGLES
    • Symptom Definition
    • Sensor/System
    • Fuel System
    • Ignition System
    • Engine Mechanical
    • Additional Checks
  • Restricted Exhaust
    • Notes
    • Test Description
    • Test Procedure
    • Diagnostic Aids
• INTERMITTENTS
  • Notes
  • Definition
  • Preliminary
  • Harness Or Connector INTERMITTENTS
  • Electrical Connections Or Wiring
  • Control Module/Component Power & Grounds
  • Temperature Sensitivity
  • Electromagnetic Interference (EMI) & Electrical Noise
  • Incorrect Pcm Programming
  • Duplicating Failure Conditions
  • Scan Tool Snapshot
  • Vehicle Data Recorder