Medium and Heavy Trucks
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Hi my name is***** will be glad to help. What is the engine model info from the engine tag and what do tou have for fault codes logged if any?
Turn off cruise, Hold set/resume switch and then count the malfunction light flashes for the two digit code. Let me know what you get
Thanks for the update. Does your engine have the fully mechanical fuel pump or is it the electronic injectors?
that changes everything. Ok you need to verify power to the fuel shutoff on the injection pump. It is possible you have either a faulty fuel shut off solenoid on the pump or you are loosing power from the IGN switch to power the solenoid causing it to shut down
Does it shut down instantly like someone turned off the IGN switch?
Ok thanks for the update. Will this shut down frequently while idling? If so someone can monitor the fuel shutoff power to see if there is a loss of power to the shutoff solenoid causing the no start and shut down condition. Check your fuses and relays.... I know alot of these trucks had breakers.... Could be a breaker triping and then resetting
If that is the case it could be from a shorting solenoid or wire to the shutdown shorting against the block. Let me know
Sounds good. Pleasure to help.