HEAD (L.H.) 2K3767 - Caterpillar

Probable Causes
Diagnostic codes
Air inlet and exhaust system
Air leakRecommended Actions
Table 1
Troubleshooting Test Steps Values Results
1. Check for Diagnostic Codes
A. Connect Cat® Electronic Technician (ET) to determine if any diagnostic codes for the injector solenoids are present. Check that the injector trim codes have been entered. Perform the "Injector Solenoid Test". Observe that the injector solenoids are being energized on Cat ET. Perform the "Cylinder Cutout Test". Locate the misfiring cylinder. Refer to the diagnostic functional test Troubleshooting, "Injector Solenoids".
Diagnostic Codes
Result: There are no diagnostic codes.
Proceed to Test Step 2.
Result: There are diagnostic codes.
Repair: Troubleshoot the diagnostic codes before continuing with this procedure.
2. Check the Air Inlet and Exhaust System
A. Check the air inlet manifold pressure. Check for air inlet restrictions and/or leaks. Refer to the Systems Operation/Testing and Adjusting manual for more information.
B. Check for leaks between the exhaust manifold and the turbocharger. Check for exhaust restrictions. Refer to the Systems Operation/Testing and Adjusting manual for more information.
Air Inlet and Exhaust System
Result: The air inlet and exhaust system is OK.
Return the engine to service.
Result: The air inlet and exhaust system is NOT OK.
Repair: Repair or replace any damaged or worn components.