Engine Controls (Troubleshooting & Diagnosis)

• Symptoms - Engine Controls
  • Important Preliminary Inspections Before Starting
• Intermittent Conditions
• 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
• Malfunction Indicator Lamp (MIL) Inoperative
  • Circuit Description
  • MIL Operation
• Malfunction Indicator Lamp (MIL) Always On
  • Circuit Description
  • MIL Operation
  • Test Description
• Engine Cranks but Does Not Run
  • Description
• Ignition 1 Relay Diagnosis
  • Circuit Description
  • Diagnostic Aids
• Fuel System Diagnosis
  • System Description
• Fuel Injector Coil Test
  • Circuit Description
  • Diagnostic Aids
• Fuel Injector Balance Test with Special Tool
  • Description
• Fuel Injector Circuit Diagnosis
  • Circuit Description
  • Diagnostic Aids
• Fuel Tank Leak Test
  • Description
  • Diagnostic Aids
  • Test Description
• Alcohol/Contaminants-in-Fuel Diagnosis (without Special Tool)
  • Description
  • 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
• 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
  • Description
  • Conditions for Running
  • Diagnostic Aids
  • Test Description
• Inspection/Maintenance (I/M) System DTC Table
• Inspection/Maintenance (I/M) Catalyst System Set Procedure
  • Description
  • Conditions for Running
  • Diagnostic Aids
• Inspection/Maintenance (I/M) Evaporative Emission (EVAP) System Set Procedure
  • Description
  • Conditions for Running
  • Diagnostic Aids
• Inspection/Maintenance (I/M) Heated Oxygen Sensor/Oxygen Sensor (HO2S/O2S) System Set Procedure
  • Description
  • Conditions for Running
  • Diagnostic Aids
• Inspection/Maintenance (I/M) Heated Oxygen Sensor (HO2S) Heater System Set Procedure
  • Description
  • Conditions for Running
  • Diagnostic Aids