Symptom Tree t081
| 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 Manual for CELECT™ Systems, Bulletin 3666084. |
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Keyswitch circuit is malfunctioning |
Check the vehicle keyswitch circuit. Refer to Procedure 019-064 in the Troubleshooting and Repair Manual CELECT™ Systems, Bulletin 3666130, and the Troubleshooting and Repair Manual CELECT™ Systems, Bulletin 3666084. |
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PT fuel pump fuel shutoff valve manual opening is engaged |
Check the manual opening knob to be sure it is in the fully counterclockwise position. Refer to Procedure 005-043 and PT Fuel Pump Rebuild and Calibration Manual, Bulletin 3379084. |
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Fuel shutoff valve (FSOV) solenoid or circuit is malfunctioning (electronically controlled fuel systems) |
Check the fuel shutoff valve solenoid and circuit. |
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Fuel shutoff valve (FSOV) is stuck open |
Verify that the solenoid or coil is not being energized by a short in the wiring. Remove the FSOV and check the valve disc and spring washer. Refer to Procedure 019-050 in the Troubleshooting and Repair Manual CELECT™ Plus Systems, Bulletin 3666130, or Troubleshooting and Repair Manual for CELECT™ Systems, 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. |
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Overhead fuel tank check valve is restricted or is not opening |
Check the fuel tank check valve for debris. Check the valve for the correct plumbing arrangement. Refer to the OEM service manual. |
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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 check ball is not seating correctly or is missing |
Check the injectors. Repair or replace the injectors as necessary. Refer to Procedure 006-026. |
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Engine is running on fumes drawn into the air intake |
Check the air intake ducts. Locate and isolate the source of the fumes. Repair as necessary. Refer to the OEM service manual. |
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Fuel tank vents are plugged or damaged |
Remove and clean the tank vents. Replace the vents if necessary. Refer to the OEM service manual. |
