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Old 01-20-2012, 06:41 PM
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Bob

Driving my 1999 7.3 down the road today when suddenly the truck died. Had this same problem a year ag and the Ford dealer replaced the pcm. Is it possible for 2 pcm's to go bad that quickly or is there another problem the dealer may have missed?
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Old 01-20-2012, 10:05 PM
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Most likely the CPS.
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Old 01-20-2012, 11:39 PM
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That would be my guess. This is not the end all answer, but does the "Wait to Start" Light come on when you first turn on the key? I have heard on here that usually this is a good indication of whether the PCM is good or not. Meaning if it does come on for a few seconds and go off (depending on EOT) then the PCM is good and if it doesn't it is bad. Also, does the tachometer needle move when cranking? It won't if the CPS is bad. Just two ideas to narrow it down. I haven't had the CPS problems, but there was a recall and seems like everyone BUT me has had at least one, if not multiple CPS failures.
-Aaron
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Old 01-20-2012, 11:48 PM
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CPS gets another vote here.
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Old 01-21-2012, 11:05 AM
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Bob

Thanks guys but it turned out to be a blown fuse. #30 that feeds the pcm.
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Old 01-21-2012, 06:05 PM
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Well you probaly blew the fuse again if that is the case unplug and leave unhooked the fuel bowl heater and it will not blow again.
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