Engine won't stop!! - Ford Powerstroke Diesel Forum
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Old 12-07-2010, 04:43 PM
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Engine won't stop!!

My 7.3L won't stop running. I turn the ignition off and the motor keeps running. Just started doing this today. Any thoughts?
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Old 12-07-2010, 05:38 PM
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alternator?
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Old 12-07-2010, 05:40 PM
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Better than not starting i guess
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Old 12-07-2010, 05:45 PM
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Yes I guess so. The mechanic says I may need a new PCM. I don;t know how the PCM just becomes faulty.
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Old 12-07-2010, 05:45 PM
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Maybe and ignition switch???? not sure. Sumfin ain't shutting the fuel off to the engine.
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Old 12-07-2010, 06:12 PM
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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.
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Old 12-07-2010, 06:17 PM
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No way its the pcm being faulty, its got to be something going on with the ignition.
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Old 12-07-2010, 06:21 PM
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Any ideas then?
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Old 12-07-2010, 06:27 PM
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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.
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Old 12-07-2010, 06:29 PM
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I bet ignition switch or a simple relay. Change all of your relays to be sure.
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