Engine won't stop!!

stock · #1 (**permalink**) 12-07-2010, 04:43 PM

My 7.3L won't stop running. I turn the ignition off and the motor keeps running. Just started doing this today. Any thoughts?

Diesel FarmBoy54 · #2 (**permalink**) 12-07-2010, 05:38 PM

alternator?

big sig · #3 (**permalink**) 12-07-2010, 05:40 PM

Better than not starting i guess

stock · #4 (**permalink**) 12-07-2010, 05:45 PM

Yes I guess so. The mechanic says I may need a new PCM. I don;t know how the PCM just becomes faulty.

tvmechanic21 · #5 (**permalink**) 12-07-2010, 05:45 PM

Maybe and ignition switch???? not sure. Sumfin ain't shutting the fuel off to the engine.

stock · #6 (**permalink**) 12-07-2010, 06:12 PM

Yes, I pulled the ignition selenoid, and the dam thing still runs. I end up pulling the PCM selenoid and it finally quits. Either somthing is telling the PCM to stay on or I think the PCM may be fualty. I tried letting it run in the stop poisition and it finally quite about 30 seconds after the key had been pulled. Not sure what to do next.

**95dieselsmoke** · #7 (**permalink**) 12-07-2010, 06:17 PM

No way its the pcm being faulty, its got to be something going on with the ignition.

stock · #8 (**permalink**) 12-07-2010, 06:21 PM

Any ideas then?

**95dieselsmoke** · #9 (**permalink**) 12-07-2010, 06:27 PM

Have you taken the trim off from around the steering wheel just to watch and see what the ignition tumbler does? Honestly I am not sure whats going on, but maybe just taking that trim off so you can see what the mechanism is doin may help some. Sorry, not much help I know.

dereku · #10 (**permalink**) 12-07-2010, 06:29 PM

I bet ignition switch or a simple relay. Change all of your relays to be sure.

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