Engine Control System - 8.1L - Troubleshooting & Diagnosis

• Symptoms - Engine Controls
  • Important Preliminary Inspections Before Starting
  • Visual/Physical Inspection
  • Intermittent
• Hard Start
• Surges/Chuggles
• Lack of Power, Sluggishness, or Sponginess
• Detonation/Spark Knock
• Hesitation, Sag, Stumble
• Cuts Out, Misses
• Poor Fuel Economy
• Poor Fuel Fill Quality
• Rough, Unstable, or Incorrect Idle and Stalling
• Dieseling, Run-On
• Backfire
• Engine Cranks but Does Not Run
  • Description
• Ignition Relay Diagnosis
  • Circuit Description
• Fuel Pump Electrical Circuit Diagnosis
  • Circuit Description
  • Diagnostic Aids
  • Test Description
• Fuel System Diagnosis
  • System Description
  • Test Description
• Fuel Injector Coil Test
  • Circuit Description
  • Diagnostic Aids
  • Test Description
• Fuel Injector Balance Test with Special Tool
  • Notes
  • Test Description
• Fuel Injector Balance Test with Tech 2
  • Circuit Description
  • Test Description
• Fuel Tank Leak Test
  • Description
  • Diagnostic Aids
  • Test Description
• Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)
  • Notes
  • Alcohol in Fuel Testing Procedure
  • Particulate Contaminants in Fuel Testing Procedure
• Alcohol/Contaminants-in-Fuel Diagnosis (With Special Tool)
  • Description
  • Test Procedure
• Electronic Ignition (EI) System Diagnosis
  • Circuit Description
  • Diagnostic Aids
  • Test Description
• Inspection/Maintenance (I/M) System Check
  • Description
  • Conditions for Updating the I/M System Status
  • Monitored Emission Control Systems
• Inspection/Maintenance (I/M) Complete System Set Procedure
  • Diagnostic Fault Information
  • Description
    • Notes
    • I/M Data List
  • Conditions for Meeting a Cold Start
  • Circuit/System Verification
  • Inspection/Maintenance (I/M) System Set Procedure
• Inspection/Maintenance (I/M) System DTC Table