Fuel and Emissions Systems

Symptom Troubleshooting Index (cont'd)

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Symptom Diagnostic Procedure Also check for
Warming up
  1. Intake System.

    (Intake manifold, air cleaner, MAF sensor)

  2. Fuel filter, Fuel Line, Fuel, Fuel Condition.
  3. Glow System.

    (Glow Relay, Glow Plug)

  4. Exhaust System.

    (EGR system, Turbocharger, Vacuum system)

  5. Fuel Injection System.

    (Injector, Supply Pump, Common Rail)

  6. ECM (ECM, Fail Safe Mode)
  • Low Compression
  • Contaminated Fuel
  • Engine Mechanical
  • Chassis Parts Error
After warm up
  1. Intake System.

    (Intake manifold, air cleaner, MAF sensor)

  2. Fuel filter, Fuel Line, Fuel, Fuel Condition.
  3. Exhaust System.

    (EGR system, Turbocharger, Vacuum system)

  4. Fuel Injection System.

    (Injector, Supply Pump, Common Rail)

  5. ECM (ECM, Fail Safe Mode)
  • Low Compression
  • Contaminated Fuel
  • Engine Mechanical
  • Chassis Parts Error

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