Ignition System: Technical Service Bulletins

• Customer Interest
  • Engine - Power Loss, Hesitation, Roughness/Backfire
  • Engine - Miss, Hesitation, or Roughness
  • DTC 42 (EST/ECM Harness Wire Routing) Set
  • Engine - Poor Driveability/Fuel Mileage
  • Engine - Erratic Idle and Misfiring Under Load
• By Symptom
  • Customer Interest
    • Engine - Power Loss, Hesitation, Roughness/Backfire
    • Engine - Miss, Hesitation, or Roughness
    • DTC 42 (EST/ECM Harness Wire Routing) Set
    • Engine - Poor Driveability/Fuel Mileage
    • Engine - Erratic Idle and Misfiring Under Load
  • Driveability
    • Engine - Power Loss, Hesitation, Roughness/Backfire
    • Engine - Miss, Hesitation, or Roughness
    • Engine - Poor Driveability/Fuel Mileage
    • Engine - Erratic Idle and Misfiring Under Load
  • Erratic Operation
    • Engine - Power Loss, Hesitation, Roughness/Backfire
    • Engine - Miss, Hesitation, or Roughness
  • False instrument warning light/gauges
    • DTC 42 (EST/ECM Harness Wire Routing) Set
  • Noise
    • Engine - Erratic Idle and Misfiring Under Load
• All Technical Service Bulletins
  • HEI System - Description and Diagnosis Chart
  • Engine - Power Loss, Hesitation, Roughness/Backfire
  • Engine - Miss, Hesitation, or Roughness
  • Ignition - Spark Plug Application & Gap
  • DTC 42 (EST/ECM Harness Wire Routing) Set
  • HEI Module - Testing Updated
  • Engine - Poor Driveability/Fuel Mileage
  • Engine - Erratic Idle and Misfiring Under Load