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Originally Posted by ripperdog
The fix was simple...just move one wire in the O2 sensor harness plug.
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HA! I'm not surprised in the least amount by this news, but still, ain't it a hoot? Electronics and electrical problems in general are usually like this. Guess that's why I'm studying to be an electrical engineer: if you know what to look for, you're 90% there.
I'm very happy that you found out what it was so quickly, though. Props to you, but sorry I can't help you with a new EEC-IV PCM. I'd probably look for one in a boneyard out of a REALLY wrecked Mustang, because unless it was absolutely FUBAR in the passenger side, the computer should be fine.
tmoss: I think he'd be best off finding a whole new PCM because if there was a voltage surge up to the PCB, not to mention through the signal circuits, it's cooked and may present problems later down the road, even if the gap is bridged. There is a gap there
for a reason, and bridging it would be like sticking a piece of aluminum foil into a fuse socket " 'cuz the damn thing keeps blowing."
hehehe, i have to laugh a little because I've done that before to get home...but, I digress.