Troubleshooting

60 RENR2696-01
Troubleshooting Section
Individual Malfunctioning Cylinders
1. With the engine speed at a fast idle, loosen the
high pressure fuel line to the fuel injection nozzle
of number 1 cyl
inder. Note if there is any reduction
in engine speed. Tighten the high pressure fuel
line to the fuel injection nozzle.
2. Individually repeat this procedure for each fuel
injection nozzle.
3. If there is no reduction in the engine speed
proceed to “Checking the Fuel Injection Nozzles”.
4. If all cylinders have been checked and no
problems were detected proceed to “Valve Lash”.
Valve Lash
1. Check the val
ve lash and reset the valve lash, if
necessary. Refer to Systems Operation, Testing
and Adjusting, “Engine Valve lash - Inspect and
Adjust”.
2. If the repair does not eliminate the fault proceed to
“Check for L
ow Compression”.
Check for Low Compression
1. Remove the fuel injection nozzles and perform a
compression test. Refer to Systems Operation,
Testi n g an d
Adjusting, “Compression - Test”.
2. Make all necessary repairs to the engine.
3. Ensure that the repairs have eliminated the faults.
4. If the repa
ir does not eliminate the fault proceed to
“Checking the Fuel Injection Nozzles”.
Examples o
f low compression are shown in the
following list:
•
Mechanica
l problem
•
Faulty piston rings
•
Worn cylinder bores
•
Worn valve
s
•
Faulty cylinder head gasket
•
Damaged cylinder head
Checking t
he Fuel Injection Nozzles
1. Remove the fuel injection nozzles from the cylinder
head. Refe
r to Disassembly and Assembly, “Fuel
InjectionNozzle-Remove”.
2. Check the fuel injection nozzles. Refer to Testing
and Adjusting,
“Fuel Injection Nozzle - Test”.
3. Ensure that the repairs have eliminated the
problems.
4. If the problem has not been eliminated, proceed
to “Check the T
urbocharger (if equipped)”.
Check the Turbocharger (if equipped)
Note: The turbochargers that are equipped on 1100
Series engines are nonserviceable items. If any
mechanical f
ault exists then the turbocharger must
be replaced.
1. Ensure that t
he mounting bolts for the turbocharger
are tight.
2. Check that th
e turbocharger drain is not blocked
or restricted.
3. Check that th
e turbocharger housing is free of dirt
and debris.
4. Check the tu
rbocharger for worn bearings. Refer
to Systems Operation, Testing and Adjusting,
“Turbocharger - Inspect”. The turbochargers that
are equippe
d to 1100 series engines are not
serviceable. If any mechanical fault exists then the
turbocharger should be replaced.
5. Check that the turbine blades rotate freely on the
turbocharger. Refer to Systems Operation, Testing
and Adjust
ing, “Turbocharger - Inspect”.
6. Ensure that the wastegate on the turbocharger is
adjusted c
orrectly. Refer to Systems Operation,
Testing and Adjusting, “Turbocharger - Inspect”.
The adjustment to the wastegate is set at the
factory.
If the adjustment of the wastegate is
incorrect then the turbocharger must be replaced.
7. Make all n
ecessary repairs to the engine.
8. Ensure that the repairs have eliminated the faults.
9. If the fault has not been eliminated proceed to
“ECM Parameters”.
ECM Parameters
1. Ensure th
at the problem is not a programmed
parameter.
2. Use the el
ectronic service tool to ensure that the
correct mode was selected.
3. Use the e
lectronic service tool to verify that the
correct engine rating has been provided.