I'm in the middle of a complete resto-mod on an '86 Capri. Here's the thread if anyone cares to check it out. http://mustangforums.com/forum/5-0l-...a-foxbody.html
So three years into it, it still needs an interior and some other odds and ends. I got it running... but it won't idle and I can't pull codes.
I started checking everything under the sun since I rewired about 85% of the car myself and thought I had screwed up somewhere along the line.
I couldn't find anything that I messed up, so today I got some time and pulled the ECU because I heard that if the wrong O2 harness and computer are used it can cause the circuit to fry and then not be able to pull codes.
Early in the build, I got an Ebay mass air conversion kit from Fiveology Racing that came with a used A9P computer... so I wanted to check it out incase the P/O had done something stupid with it and is causing me all this grief.
Well, once it was opened, it was obvious there was something wrong.
Can you see it??
Yep, it's a super small piece of jumper wire soldered from pin 46 to a transistor looking thing.
What idiot would do this and why? Pin 46 is the return signal from the diagnostic connector and most of the engine sensors... so this at least explains why I can't pull codes... and I hope it's the cause of the idle issue also.
I'm going to get a new ECU and see what happens... I hope what I've found has been the problem I've been searching for and I can finally get this thing running right once and for all.