2004 6.8l engine just shuts off no code
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Mountain Pass
Joined: Nov 2007
Posts: 226
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From: Chehalis, WA
2004 6.8l engine just shuts off no code
I've got a 2004 f250 4x4 crew cab that is driving me nuts. It runs great, but sporadically it will just quit running. Tach drops to zero. Engine is still turning, because it usually restarts by itself as long as I am moving over about 45. If not I can pull over, put it in park and restart it. Sometimes it sets codes, never the same ones and usually not something even related to the problem (transfer case solenoid for example). Most times it doesn't set any codes. I have changed the plugs and coil packs on all cylinders. Right now it is showing the P1000 code so I am suspicious of the pcm or the wiring to it. I think the tach is the only thing dropping out on the instruments and all the instruments are powered through the pcm. I would be tearing my hair out, but I am already bald so I am looking for educated guesses.
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
An educated guess would be to replace the PCM Power Relay. Sounds like it's intermittently dropping out. Might be the ignition switch or one of the other critical components in the PCM's power supply chain.
The P1000 code simply means that the PCM's memory was reset and that it has not yet completed all its self tests (monitors).
The P1000 code simply means that the PCM's memory was reset and that it has not yet completed all its self tests (monitors).
Thread Starter
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Mountain Pass
Joined: Nov 2007
Posts: 226
Likes: 0
From: Chehalis, WA
An educated guess would be to replace the PCM Power Relay. Sounds like it's intermittently dropping out. Might be the ignition switch or one of the other critical components in the PCM's power supply chain.
The P1000 code simply means that the PCM's memory was reset and that it has not yet completed all its self tests (monitors).
The P1000 code simply means that the PCM's memory was reset and that it has not yet completed all its self tests (monitors).
Thanks for the help!
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