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Symptom Tree t066
Cause | Correction |
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Electronic fault codes active or high counts of inactive fault codes |
Refer to Section TF in the CELECT Plus™ Systems Troubleshooting and Repair Manual, Bulletin 3666130, or Section TF in the CELECT™ Systems Troubleshooting and Repair Manual, Bulletin 3666084. |
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Air in the fuel system |
Check for air in the fuel system. Refer to Procedure 006-003 in Section 6. |
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Fuel level is low in the tank |
Fill the supply tank. Refer to the OEM vehicle specifications. |
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Fuel inlet restriction |
Check for fuel inlet restriction. Refer to Procedure 006-020 in Section 6. |
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Engine idle speed is set too low (electronically controlled fuel systems) |
Verify the correct idle speed setting. Increase the idle speed with INSITE™ electronic service tool. |
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Engine idle speed is set too low (mechanical fuel systems) |
Adjust the fuel pump idle speed. Refer to Procedure 005-029 in Section 5. |
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Electronic control module (ECM) calibration is malfunctioning |
Verify that the electronic control module (ECM) calibration is correct. Check the calibration revision history for applicable fixes to the calibration stored in the ECM. Refer to the calibration history spreadsheet on QuickServe™ Online Internet Website or the INCAL™ calibration CD. Compare the calibration stored in the ECM with the engine rating and the Control Parts List (CPL), Bulletin 4021328. If necessary, calibrate the ECM. Refer to Procedure 019-032 in Section 19 of the CELECT Plus™ Systems Troubleshooting and Repair Manual, Bulletin 3666130, or the CELECT™ Systems Troubleshooting and Repair Manual, Bulletin 3666084. |
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Fuel drain line restriction |
Check or replace the fuel lines, check valves, or tank vents as needed. Refer to Procedure 006-012 in Section 6. |
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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 in Section 6. |
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Engine position sensor (EPS) or circuit is malfunctioning |
Check the engine position sensor and circuit. Refer to Procedure 019-038 and Procedure 019-039 in Section 19 of the CELECT Plus™ Systems Troubleshooting and Repair Manual, Bulletin 3666130, or Procedure 019-038 and Procedure 019-039 in Section 19 of the CELECT™ Systems Troubleshooting and Repair Manual, Bulletin 3666084. |
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Vehicle speed sensor (VSS) or circuit is malfunctioning |
Refer to the appropriate electronic service tool manual. If the monitor shows speed, check the sensor and circuit. Refer to Procedure 019-090 and Procedure 019-091 in Section 19 of the CELECT Plus™ Systems Troubleshooting and Repair Manual, Bulletin 3666130, or the CELECT™ Systems Troubleshooting and Repair Manual, Bulletin 3666084. |
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Injector is malfunctioning (PT/STC) |
Remove and check the injectors. Replace injectors as necessary. Refer to Procedure 006-026 in Section 6. |
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Automotive and variable speed (VS) governor idle speeds are set too close (STC engines only) |
Adjust the automotive and VS idle speeds. Refer to Procedure 005-028 and Procedure 005-029 in Section 5. |
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Auxiliary governor (if equipped) is not adjusted correctly |
Adjust the idle speed above the engine fuel pump idle speed setting. Refer to the OEM service manual. |
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Throttle linkage adjustment is not correct |
Check the fuel pump throttle linkage adjustment. Refer to Procedure 005-036 in Section 5. |
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PT fuel pump calibration is not correct |
Remove the fuel pump. Check the calibration. Refer to Procedure 005-016 in Section 5 and PT™ Fuel Pump Rebuild and Calibration Manual, Bulletin 3379084. |
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PT fuel pump is not assembled correctly |
Check the fuel pump for correct assembly and installation. Refer to Procedure 005-016 in Section 5 and PT™ Fuel Pump Rebuild and Calibration Manual, Bulletin 3379084. |
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Camshaft end clearance is excessive |
Check the camshaft end clearance. Refer to Procedure 001-065 in Section 1. |
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