M11 Series – Service Manual – Engine Will Not Shut Off

Electronic fault codes active or high counts of inactive fault codes

Refer to Section TF in the Troubleshooting and Repair Manual, CELECT™ Plus Fuel System, Bulletin 3666130, or Section T in the Troubleshooting and Repair Manual, CELECT™ Fuel System, Bulletin 3666084.

Keyswitch circuit is malfunctioning

Check the vehicle keyswitch circuit. Refer to Procedure 019-064 in the Troubleshooting and Repair Manual, CELECT™ Plus Fuel System, Bulletin 3666130, or in the Troubleshooting and Repair Manual, CELECT™ Fuel System, Bulletin 3666084 .

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 005-043 and the PT Fuel Pump Rebuild and Calibration Manual, Bulletin 3379084.

Fuel shutoff valve (FSOV) solenoid or circuit is malfunctioning (electronically controlled fuel systems)

Check the fuel shutoff valve solenoid and circuit.

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 Shop Manual, Bulletin 3666075.

Fuel drain line restriction

Check or replace the fuel lines, check valves, or tank vents as needed. Refer to 006-012.

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 Section 5, General Information.

Injector check ball is not seating correctly or is missing

Check the injectors. Repair or replace the injectors as necessary. Refer to 006-026.

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 OEM service manual.

Fuel tank vents are plugged or damaged

Remove and clean the tank vents. Replace the vents if necessary. Refer to OEM service manual.