Symptom Tree t043
| Cause | Correction |
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Electronic fault codes active or high counts of inactive fault codes |
Refer to Section TF in the Troubleshooting and Repair Manual for CELECT™ Plus Systems, Bulletin 3666130, or Section TF in the Troubleshooting and Repair Manaul for CELECT™ Systems, Bulletin 3666084. |
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Engine cranking speed is too slow |
Check the engine cranking speed with a handheld tachometer or electronic service tool. If the cranking speed is slower than 150 rpm, refer to the Engine Will Not Crank or Cranks Slowly symptom tree. |
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Cranking fuel pressure at the fuel pump is below specification |
Check the fuel pressure. Refer to Procedure 005-011. If fuel pressure is low, refer to the Cranking Fuel Pressure is Low symptom tree. |
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Fuel grade is not correct for the application or the fuel quality is poor |
Operate the engine from a tank of high-quality fuel. Refer to Fuels for Cummins Engines, Bulletin 3379001. |
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Fuel supply line restriction between the fuel pump and the injectors |
Check the fuel supply line from the fuel pump to the cylinder head for sharp bends that can cause restrictions. Refer to Procedure 005-011. |
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Air in the fuel system |
Check for air in the fuel system. Refer to Procedure 006-003. |
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Air intake system restriction is above specification |
Check the air intake system for restriction. Clean or replace the air filter and inlet piping as necessary. Refer to Procedure 010-031. |
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Fuel drillings in the cylinder head are plugged |
Check for a plastic fuel passage plug blocking the fuel supply to the injectors. Refer to Procedure 002-004. |
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Starting aid, if necessary for cold weather, is malfunctioning |
Check for correct operation of the cold weather starting aid. Refer to Operation of Diesel Engines in Cold Climates, Bulletin 3379009. |
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PT fuel pump AFC operation is malfunctioning or pump is not calibrated correctly |
Remove the PT® fuel pump and check the calibration. Check the AFC for proper operation. Refer to Procedure 005-016 and the PT Fuel Pump Rebuild and Calibration Manual, Bulletin 3379084. |
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Overhead adjustments are not correct |
Measure and adjust the overhead settings. Refer to Procedure 003-004. |
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Injector o-rings are damaged or missing |
Remove and check the injectors. Replace the injector o-rings. Refer to Procedure 006-026. |
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Injector is malfunctioning (PT/STC) |
Remove and check the injectors. Replace injectors as necessary. Refer to Procedure 006-026. |
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Injector is malfunctioning (CELECT™ and CELECT™ Plus) |
Perform the automated cylinder performance test. Replace injectors as necessary. Refer to Procedure 006-026. |
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Valve protrusion is below specification |
Check the valve protrusion. Replace the valve seat inserts or the cylinder head. Refer to Procedure 002-004. |
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Engine components are not correct |
Compare the Control Parts List (CPL) to the engine components. Replace components that do not meet CPL requirements. Refer to the OEM service manual. |
