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Fault finding - GM diesel engines

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Post by admin » Site Admin » Wed Jul 04, 2018 2:18 pm
Joined: Fri Aug 24, 2012 5:56 pm
Posts: 1629
Uneven Running and Misfiring
  • Air leak on suction side of fuel system
  • Water in fuel system
  • Blow past injector seating washers
  • Injectors require servicing
  • Fuel injection pump to engine timing incorrect
  • Swirl chamber insert defective
Incorrect Engine Idling and Maximum Speeds
  • Idling and maximum speed stop screws incorrectly adjusted
  • Accelerator pedal linkage maladjusted
  • Fuel filter/s require servicing
  • Operation or delivery pressure of fuel feed pump incorrect
  • Fuel pipe/s obstructed
  • Air cleaner elements require servicing
  • Blow past injector seating washers
  • Fuel injection pump to engine timing incorrect
Engine Stalls
  • Idling speed stop screw incorrectly adjusted
  • Fuel injection pump to engine timing incorrect
  • Filter and sediment trap sealing rings incorrectly located
  • Fuel feed pump delivery pressure incorrect
  • Wire to fuel shut-off valve disconnected
Lack of Power
  • Water and foreign matter in fuel filters
  • Fuel feed pump delivery pressure incorrect
  • Leak-off pipes obstructed
  • Fuel tank vent obstructed
  • Exhaust system restricted
  • Air cleaner elements require servicing
  • Accelerator pedal linkage maladjusted
  • Injectors of incorrect type
  • Injectors require servicing
  • Fuel injection pump to engine timing incorrect
  • Pump maximum speed adjustment incorrect
  • Incorrect fuel injection pump fitted
Engine Knocks
  • Fuel injection pump to engine timing incorrect
  • Injectors require servicing
  • Air in fuel system
  • Fuel injection pump start feed defective
  • Fuel injection pump injection advance defective
Engine Loses Power and Stops
  • Empty fuel tank
  • Air leak on suction side of fuel system
  • Fuel filter/s require servicing
  • Fuel tank vent obstructed
  • Fuel injection pump leak-off pipe obstructed
  • Fuel feed pump delivery pressure incorrect
  • Wire to fuel shut-off valve disconnected
Excessive Exhaust Smoke
  • Air cleaner elements require servicing
  • Blow past injector seating washers
  • Injectors of incorrect type
  • Injectors require servicing
  • More than one seating washer used on an injector
  • Fuel injection pump to engine timing incorrect
  • Incorrect fuel injection pump fitted

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