Engine Control System - Trouble Shooting - No Codes

• Introduction
• Preliminary Inspection
• Symptom Diagnosis
  • Symptoms - Engine Controls
    • Notes
    • Preliminary Checks
  • Symptoms - Engine Exhaust
    • Notes
    • Visual/Physical Inspection
    • Intermittent
    • Symptom List
  • Exhaust Leakage
    • Notes
    • Description
    • Symptom Diagnosis
  • Exhaust Noise
    • Notes
    • Description
    • Symptom Diagnosis
  • Hard Start
    • Notes
    • Definition
    • Preliminary Checks
    • Sensor Checks
    • Fuel System Checks
    • Ignition System Checks
    • Additional Checks
  • Surges/CHUGGLES
    • Notes
    • Definition
    • Preliminary Checks
    • Sensor Checks
    • Fuel System Checks
    • Ignition System Checks
    • Additional Checks
  • Lack Of Power, Sluggishness Or Sponginess
    • Notes
    • Definition
    • Preliminary Checks
    • Sensor/System
    • Fuel System Checks
    • Ignition System Checks
    • Exhaust System Checks
    • Engine Mechanical Check
    • Additional Checks
  • Detonation/Spark Knock
    • Notes
    • Definition
    • Preliminary Checks
    • Cooling System Checks
    • Sensor Check
    • Fuel System Checks
    • Ignition System Checks
    • Exhaust System Checks
    • Engine Mechanical Check
    • Additional Checks
  • Hesitation, Sag, Stumble
    • Notes
    • Definition
    • Preliminary Check
    • Fuel System Checks
    • Ignition System Checks
    • Additional Checks
  • Cuts Out, Misses
    • Notes
    • Definition
    • Preliminary Checks
    • Sensor Checks
    • Fuel System Checks
    • Ignition System Checks
  • Poor Fuel Economy
    • Notes
    • Definition
    • Preliminary Checks
    • Fuel System Checks
    • Ignition System Checks
    • Cooling System Checks
    • Additional Checks
  • Poor Fuel Fill Quality
    • Notes
    • Definition
    • Difficult To Fill
    • Over Fill
    • Pre-Mature Shut-Off Of The Fuel Dispensing Nozzle
    • Fuel Spitback
    • Liquid Fuel In EVAP Canister
    • Liquid Fuel Leak
    • Fuel Odor
  • Rough, Unstable, Or Incorrect Idle & Stalling
    • Notes
    • Definition
    • Preliminary Check
    • Sensor Checks
    • Fuel System Checks
    • Ignition System
    • Engine Mechanical Check
    • Additional Checks
  • Dieseling, Run-On
    • Notes
    • Definition
    • Preliminary Check
    • Fuel System Checks
  • Backfire
    • Notes
    • Definition
    • Preliminary Check
    • Ignition System Checks
    • Engine Mechanical Checks
  • Restricted Exhaust
    • Notes
    • Test Description
    • Diagnostic Procedures
    • Diagnostic Aids
• INTERMITTENTS
  • Intermittent Conditions
    • Notes
    • Preliminary Checks
    • Electrical Connections or Wiring
    • Road Test
    • Control Module Power & Grounds, & Component Power & Grounds
    • Temperature Sensitivity
    • Electromagnetic Interference & Electrical Noise
    • Duplicating Failure Conditions
    • Intermittent Malfunction Indicator Light
    • Loss of DTC Memory
    • Additional Checks