56 KENR6933
Troubleshooting Section
Individual Malfunctioning Cylinder
1. With the engine speed at a fast idle, use the
electronic service tool to isolate one cylinder at
atime.Noteif
there is any reduction in engine
speed. If a reduction in engine speed is not noted,
the isolated cylinder is not operating under normal
conditions.
If the isolation of a particular cylinder
results in a reduction of engine speed that is less
than normal, this may indicate that the cylinder is
operating be
low normal performance. Investigate
the cause of the fault on any cylinder that is
not operating. Investigate the cause of the fault
on any cylin
der that is operating below normal
performance.
2. If all cylin
ders have been checked and no
problems were detected proceed to “Electronic
Unit Injectors”.
Electronic Unit Injectors
1. With the en
gine speed at a fast idle, use the
electronic service tool to isolate one cylinder at
a time. Note if there is any reduction in engine
speed. If a
reduction in engine speed is not noted,
the isolated electronic unit injector is not operating
under normal conditions. If the isolation of a
particul
ar cylinder results in a reduction of engine
speed that is less than normal, this may indicate
that the electronic unit injector is operating below
normal pe
rformance.
2. Remove the electronic unit injector from the
suspect c
ylinder. Refer to Disassembly and
Assembly, “Electronic Unit Injector - Remove”.
3. Install
a new electronic unit injector. Refer to
Disassembly and Assembly, “Electronic Unit
Injector - Install”.
4. Repeat the test in 1. If the fault is still apparent,
remove the replacement electronic unit injector
and inst
all the original electronic unit injector.
Refer to Disassembly and Assembly, “Electronic
Unit Injector - Remove” and Disassembly and
Assemb
ly, “Electronic Unit Injector - Install”.
5. If the fault is not eliminated, refer to the
Troubl
eshooting Manual for your engine
application.
i02528860
Excessive Engin e O il
Consumption
Probable Causes
•
Misreading oi
l level
•
Oil leaks
•
Engine crankcase breather
•
Oil level
•
Air intake and exhaust system
•
Turbocharger
•
Low compressi
on (cylinder pressure)
Recommended A
ctions
Misreading Oil Level
1. Accurately measure the consumption of oil and
fuel over a period of 50 engine hours.
2. If the oil consumption is greater than 0.2% of the
fuel consumption, use the following procedure
in order to in
vestigate the cause of the high oil
consumption.
Oil Leaks
1. Check for evidence of oil leaks on the engine.
2. Rectify any oil leaks from the engine.
3. Check for evi
dence of oil in the coolant.
4. If no oil leaks are identified, refer to “Engine
Crankcase Br
eather”.
Engine Crankcase Breather
1. Check the engine crankcase breather for blockage
or restrictions.
2. Check for excessive oil from the outlet of the
breather.
3. Repair all defects. Verify that the repair has
eliminated the fault.
4. If no faults are found, refer to “Oil Level”.
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