ECU needed for automatic 89 GT 5 l high output

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Someone will be along shortly to offer advice.

Ransom said:

Hello everybody I'm new to this forum I'm in need of a 1989 through 1993 ECU for my 1989 mustang GT 5 l high output engine. The vehicle is an automatic so I need an a9p the original equipment number is e9zf-12a650-c2a. I already replaced the capacitors but that wasn't the only thing that was wrong the other thing that I found is a leaking corroded Texas instruments chip in the middle of the motherboard
I would be willing to solder in the broken Texas instrument chip. I have a picture of it so for example if somebody had a broken computer that'd be possibly useful. Thanks

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I'm not an electronics expert but I don't think microchips usually leak. It sounds more likely that it might be heat sink paste to me. Those Fox body mass air computers are getting rare and expensive so working on one yourself is risky. I would have just sent it out to a professional module repair service. At $400 for a used A9P and A9S computer on Ebay it's just not worth risking damage doing it yourself. Automotive Circuit Solutions, Autoecm, Upfix, and Module Master all seem to be reliable module repair services to use from people posting about them on here and have good reviews. It'll likely be cheaper for them to repair your ECM than buy another used one.

A9P, A9T, C3W, C3W1 are all the same strategy. Look for any of those.

I think A9S is a stick computer, probably would work, but runs an earlier GUFA strategy (few less features than an A9L).


If it comes down to it, and youre feeling ambitious, you can swap in a 94/95 computer fairly easily. May come with some teething issues though. I wouldn't consider it a direct swap.