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1163 Views 9 Replies 5 Participants Last post by  1997 FORDF350PS
:sick::sick::sick:P0603 code its still running

should i be looking for a pcm

have intermitting start problem

when it wont start the cel is on and no wait to start light keep pllaying with key and the cel will go out and the wait to start light will come on then it will start
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P0603 is from your chip (normal). Try pulling the chip for diagnosis (make sure power is cut to the PCM beforehand). Take that out of the equation and see what happens.

If you're having starting problems, it could be related to lots of things. There's more than one power feed to the PCM, but I'd be suspecting chip or it's connection to the PCM.
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