93 5.0 Computer Question H E L P

central_texan · Oct 24, 2016

Hello, All. I have a 93 5.0 installed in a 66 Convertible. The C3W computer (F3ZF-12A650-FA) has a broken pin and will not allow the engine to start. I can't find a computer with the same part number (only one year used). Are there any other computers out there that will substitute for this one? This is NOT a performance car so a little tamer computer would not be an issue for me. The donor car was a 5 speed and I know that the C3W is for an auto but it was running fine before I disassembled the 93 for the swap. Any guidance is appreciated.

mikestang63 · Oct 24, 2016

If you have a stick the A9L, if an AOD the A9P.

central_texan · Oct 24, 2016

Do you have a part number?

Mustang5L5 · Oct 24, 2016

What trans was the donor car. Reason I ask is because the o2 harness is pinned differently depending on trans. If originally a stick car, you need a 5spd trans.

Pic of A9L incoming

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Mustang5L5 · Oct 24, 2016

89-92 5spd computer

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central_texan · Oct 24, 2016

Donor car was a 5 speed but donor computer was C3W. That computer is 1993 specific and hard to find. I'm looking for an available substitute.

a91what · Oct 24, 2016

OK what color fuel injectors does it have in it? Orange top are 19lb....

If so I have an a9l on the shelf.

mikestang63 · Oct 24, 2016

I answerred your question . Get an A9L computer.

central_texan · Oct 24, 2016

a91what said:
OK what color fuel injectors does it have in it? Orange top are 19lb....

If so I have an a9l on the shelf.

What will you take for it?

Charles Reaves
creave@ktc.com

a91what · Oct 25, 2016

Before I pull the box down off the shelf let me ask you this, have you attempted to fix it?
Solder and imagination go a long way, you have nothing to loose trying. Take a few pictures of the damage and post them up so we can see if it's repairable.

central_texan · Oct 25, 2016

a91what said:
Before I pull the box down off the shelf let me ask you this, have you attempted to fix it?
Solder and imagination go a long way, you have nothing to loose trying. Take a few pictures of the damage and post them up so we can see if it's repairable.

Yes, I attempted to pull a pin that is not used and replace the damaged pin. But, in removing the unused pin I crushed the pin so it is useless. Also, I don't know how to remove the pins without damaging them. If there is a trick to getting the pins out, I'd be interested to know how. I did get the original pin back in the EEC but contact is intermittent at best and I don't want that going on with the computer. In the picture, the pin on top is the unused pin I removed from an adjacent location. I pretty much destroyed it getting it out. The bottom pin is the original. I inserted a stick pin in it ang got it somewhat rounded and back in the EEC but the connection is intermittent, as I said. I think I'd just as soon get a good computer that's right for the car. Thanks for your help. Let me know if you are willing to sell the A9L.

a91what · Oct 25, 2016

The pins must be desolered and removed from the back side of the connector.

If you are getting an intermittent signal then put the pin back in and solder it from the back side, it may be difficult to get to but can be done...

What pin number is damaged there may yet be an alternative.

central_texan · Oct 25, 2016

I don't see any way to get to the point that the wire and pin join. The two plastic parts (grey outer and green inner) that house the pins are epoxied and will be destroyed to separate them. I've included pics of inner and outer views.

central_texan · Oct 25, 2016

I don't see any way to get to the point that the wire and pin join. The two plastic parts (grey outer and green inner) that house the pins are epoxied and will be destroyed to separate them. I've included pics of inner and outer views.

central_texan · Oct 25, 2016

Pin 45 is the one I need.

a91what · Oct 25, 2016

Pin 45 is for baro correction.

Car should still start.

Solder a piece of wire onto the pin inside the eec run it thru the j-port to the harness and make a temporary connection to the wire for pin 45. If done correctly this could be used as a permanent solution.

central_texan · Oct 25, 2016

A91what, I'd rather not do a patch job like that. Besides, I have now destroyed pin 46 (due to some bad information I received from another forum) which is the return feed for several sensors. Are you interested in selling the A9L you have?

Mustang5L5 · Oct 25, 2016

As for pin 46.

With the EEC removed, check for voltage on the PIN 46 during the following conditions
Ignition On
Ignition off
Ignition on Clutch in
Ignition on Cranking
Ignition on Cranking Clutch in.

Should be no voltage under any circumstance. If you do, there is a wiring issue somewhere that needs to be addressed before you plug any computer in and fire it up.

Did the car ever run at all with the computer, or is this the initial setup?

a91what · Oct 25, 2016

Looking around on ebay they sell for 300+

There is a ecu exchange offer for 170 send in yours and it comes back fixed.

PM me for a price.

central_texan · Oct 25, 2016

Don't know how to PM. Please use email posted earlier on the thread.

93 5.0 Computer Question H E L P

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