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Symptom Chart

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FUEL CHARGING & CONTROLS - TURBOCHARGER SYMPTOM CHART

Condition Possible Sources Action
  • No boost/low boost
  • Clogged air cleaner element or restriction upstream of compressor.
  • INSTALL a new air cleaner element. REMOVE the restriction.
  • Compressor air intake hose collapsed.
  • REPAIR or INSTALL a new hose as required.
  • Compressor manifold hoses leaking.
  • TIGHTEN hose clamps.
  • Turbocharger turbine or compressor wheel damaged.
  • INSTALL a new turbocharger.
  • Turbocharger bearings seized.
  • INSTALL a new turbocharger.
  • Turbocharger variable vane hydraulic control valve not functioning.
  • Damaged charge air cooler (CAC).
  • REPAIR or INSTALL a new charge air cooler (CAC).
  • Damaged/defective manifold absolute pressure (MAP) sensor or hose.
  • INSTALL a new MAP sensor or hose.
  • Exhaust restriction or leak.
  • Repair as required.
  • Lack of power
  • Low compression.
  • REPAIR as required.
  • Clogged air cleaner element or restriction upstream of compressor.
  • INSTALL a new air cleaner element. REMOVE the restriction.
  • Insufficient fuel supply.
  • REPAIR or INSTALL new fuel system components as required.
  • Turbocharger variable vane hydraulic control valve not functioning.
  • Damaged/defective manifold absolute pressure (MAP) sensor or hose.
  • INSTALL a new MAP sensor or hose.
  • Exhaust restriction.
  • REPAIR as required.
  • Excessive fuel consumption (black exhaust smoke)
  • High fuel pressure.
  • Fuel pressure regulator.
  • Fuel return tube plugged or kinked.
  • CLEAN or INSTALL a new fuel return tube as required.
  • Injectors leaking.
  • INSTALL new injectors.
  • Powertrain control module malfunctioning.
  • Exhaust restriction.
  • REPAIR as required.
  • Excessive oil consumption (blue, gray or white exhaust smoke)
  • Incorrect type or grade of oil.
  • DRAIN and FILL with specified oil.
  • Extended oil change intervals.
  • CHANGE oil as recommended.
  • Clogged air cleaner element or restriction upstream of compressor.
  • REPAIR as required.
  • Engine wear (piston rings, valve guides).
  • REPAIR as required.
  • Turbocharger oil seals leaking.
  • Noise or vibration
  • Leaks at turbocharger inlet and outlet connections.
  • REPAIR as required.
  • Foreign object damage to turbine or compressor blades.
  • INSTALL a new turbocharger.
  • Turbine bearing failure.
  • INSTALL a new turbocharger.
  • High boost
  • Leak in exhaust system before muffler.
  • REPAIR as required.
  • Malfunctioning turbocharger variable vane hydraulic control valve.
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