i05991971
Cylinder Is Noisy
Probable Causes
• Diagnostic codes
• Fuel quality
• Valve train components
• Injectors
• Pistons
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
Table 13
Troubleshooting Test Steps Values Results
1. Diagnostic Codes
A. Establish communication between the electronic service tool and
the Electronic Control Module (ECM).
B. Check for active diagnostic codes.
Codes Result: A diagnostic trouble code is active or logged.
Troubleshoot the active or logged codes. Refer to Trouble-
shooting, “Diagnostic Trouble Codes”.
Result: A diagnostic trouble code is not active or logged.
Proceed to Test Step 2.
2. Fuel Quality
A. Check the fuel quality. Refer to Systems Operation, Testing, and
Adjusting, “Fuel Quality - Test”.
B. Refer to Operation and Maintenance Manual for information on
the proper characteristics of the fuel for the engine.
Fuel Result: The fuel quality is not OK.
Drain the fuel system and replace the fuel filters. Refer to
the Operation and Maintenance Manual, “Fuel System Pri-
mary Filter (Water Separator) Element - Replace” and Op-
eration and Maintenance Manual, “Fuel System Filter -
Replace”.
Fill the fuel system with fuel that meets the standard in the
Operation and Maintenance Manual, “Fluid
Recommendations”.
Prime the fuel system. Refer to the Operation and Mainte-
nance Manual, “Fuel System - Prime”.
Verify that the procedure has eliminated the noise.
Result: The fuel quality is OK.
Proceed to Test Step 3.
(continued)
UENR0612
45
Symptom Troubleshooting
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