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Home >> Volkswagen >> 2000 >> Golf GL, 1.9 F, Standard >> Repair and Diagnosis >> Engine Performance >> System >> 1.9L - Diesel Fuel Injection - ALH (A4 Platform) >> Diesel direct injection system, servicing >> Injectors, removing and installing >> Notes
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Injectors, removing and installing: Notes

NOTE: Faulty injectors can cause the following malfunctions:
  • Engine runs rough
  • Diesel knock
  • Knocking in one or more cylinders
  • Engine overheating
  • Loss of power
  • Excessive black smoke
  • Increased fuel consumption
  • Excessive blue smoke when starting from cold

Faulty injectors can be located by loosening the high pressure line union on each injector in turn, with the engine running at a fast idling speed. If the engine speed remains constant after loosening a line union, this indicates a faulty injector.