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Truck Repair/N14 cutting out, or hickups?


bobcloudindy wrote at 2006-07-26 15:26:56
did you clean the check valve coming out of the ecm? i had this problem. i replaced the fuel separator, changed the fuel lines and found that the fuel runs through the ecm plate , it has a check valve behind the top hose, it was stuck. replaced it and works fine,but i had it in the shop 8 times before i finaly got it fixed.

TOBMA wrote at 2007-03-27 00:50:07
Throttle pedal wires going through fire wall will have bad contact. Some units have gold pins installed to help. Terminals will look fine but will still lose contact. I have found twisting three new wires and running them straigt to the ecm to the trottle pedal through a hole in the firewall Works fine. I have also seen engine postion sensor working out of its internal holder. Make sure four pin connector dosen't have oil in it. If it does, it is a sign the engine speed sensor needs to be replaced.

larryM wrote at 2007-08-18 02:29:16
I had a similar problem on my M11. after 2yrs and many trips to cummins and dealer, I had a shop replace the jake brake wiring harness.guess what? they found wires had rubbed thru at the loom.

mec wrote at 2015-02-17 20:29:56
I found on 97 pete a bare wire on inj wire harness back left going up to injectors rubbing on

fuel line  

Truck Repair

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Cliff B.


I am ASE Certified Med/HD Master Tech but only work on Cummins engines. I have worked on them since 1989. I can answer questions about electronic or mechanical problems with heavy duty or mid range Cummins engines.(ISX, ISM, ISB, ISC, L10, M11, N14, 6C, and B series).


I have worked on Cummins engines since 1989.I am ASE certified Master Med & HD Truck Mechanic.

Nashville Auto Diesel College Graduate in 1984.

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