Could it be the ECU? - Page 2 - Muscular Mustangs
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post #11 of 21 Old 07-28-2004, 07:13 PM Thread Starter
 
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Re: Tough one

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Originally Posted by Art
However, I would say your injector driver is going.
I take it the injector driver is part of the ECU some how?

Quote:
Swapping out the computer would help. Any 5.0 Cobra computer could at least idle the car, I would think. Wish I could be of more help.
We just installed a brand new ECU from Ford the other day and it made absolutely no differenace.
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post #12 of 21 Old 07-28-2004, 07:25 PM
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Ut Oh

Yeah the driver is circuitry in the ECU in charge of injector switching.

With the new computer on the car and the car showing the same symptoms, I'm not sure where to go with this. You sure you checked the 10 prong black/white connectors of the harness? Pull the plugs apart and clean the plugs, making sure the female side is slightly collapsed to ensure connection with the males. After that I would go to the computers grounds.
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post #13 of 21 Old 07-28-2004, 07:29 PM Thread Starter
 
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Re: Ut Oh

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Originally Posted by Art
... After that I would go to the computers grounds.
That's exactly where I was going next. Where can I find most of them?
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post #14 of 21 Old 07-29-2004, 12:43 PM Thread Starter
 
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ttt
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post #15 of 21 Old 07-29-2004, 03:00 PM
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I would think that there would be one ground for the computer itself. The problem is you'd need to find somebody with a wiring schematic to see which wire it is and then trace it until you find out where it actually grounds.



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post #16 of 21 Old 07-29-2004, 07:19 PM
Art
 
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Grounds

Not sure how to attached files to posts, but I can e-mail you the pin-out assignments for the 94/95 GT. For the grounds I doubt the Cobra is different. Hope this helps. It is a good idea IMHO to jump the 20, 40 and 60 pins to the negative battery terminal by running a dedicated wire.

Checking the grounds is a good exercise in any case, but I'd think about other influences as well. Was there any mod done or symptom seen just before you had this problem?
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post #17 of 21 Old 07-30-2004, 02:24 AM
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there's no real way to attach files to this forum, but if you want to e-mail me the files i'll upload them and post them here.



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post #18 of 21 Old 07-30-2004, 04:27 AM
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ECU wiring pin numbers

Here they are. I put them both together on one page to hopefully make them easier to read and so they don't resize themselves.
I hope this helps. Thanks Art!

https://www.muscularmustangs.com/wiring.php



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post #19 of 21 Old 09-01-2004, 09:11 AM
 
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For lots of diagrams of the Mustang wiring, go to:

www.veryuseful.com/mustang/tech/engine

and look around.
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post #20 of 21 Old 09-01-2004, 12:09 PM
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Looks like a very useful site! Thanks for contributing Tom.



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