DIAGNOSTICS
3-2
©
200416
CE engine inlet/exhaust system
1
ΧΦ65/75/85 series
4
3.2 FAULT-FINDING TABLE
SYMPTOM: REDUCED POWER AT ALL ENGINE SPEEDS
Possible cause Remedy
Air filter element blocked Replace the air filter element
Turbocharger defective/wastegate control incor-
rect Check the turbocharger/wastegate control
Air leak in inlet system Pressure-test the inlet system
SYMPTOM: REDUCED POWER ABOVE A CERTAIN ENGINE SPEED
Possible cause Remedy
Air filter element partially blocked Check/replace the air filter element
Air leak in inlet system Pressure-test the inlet system
SYMPTOM: FUEL CONSUMPTION TOO HIGH
Possible cause Remedy
Turbocharger defective Check the turbocharger
Air leak in inlet system Pressure-test the inlet system
SYMPTOM: REDUCED MAXIMUM ENGINE SPEED
Possible cause Remedy
Turbocharger defective Check the turbocharger
SYMPTOM: RISING AND FALLING TURBOCHARGER SOUNDS
Possible cause Remedy
Blocked turbocharger air intake Check air intake and remove any obstacles
Compressor side of turbocharger contaminated Clean compressor side with a non-corrosive clean-
ing agent or a soft brush. Check the intake side for
carbon deposits or other contamination
Turbocharger damaged Replace the turbocharger and identify the cause
SYMPTOM: BLACK SMOKE EMERGES FROM EXHAUST
Possible cause Remedy
Air filter element blocked Replace the air filter element
Air leakage between turbocharger and inlet mani-
fold Check flexible pipes and pressurise intake unit
Air leakage between the inlet manifold and cylinder
head Check for leakage. Replace gaskets, if necessary
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