Mustang5L4, you mean to check pin 46 on the car connector, don't you. We never had any issues with pin 46. I was told that pin 46 was not used by Ron Francis Wiring so I removed it to replace pin 45. Now I find that pin 46 is the ground feed for several sensors, so now the computer is worthless.
93 5.0 Computer Question H E L P
- Thread starter central_texan
- Start date
Yes, I meant on the harness side. But, didn't know you had custom wiring and damaged the pin physically. So really this is a little different than typical 5.0 efi troubleshooting.
So just to add one more question. Did car ever run in this setup? As stated before, pin 47 is for the BAP sensor. Car should still start.
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So just to add one more question. Did car ever run in this setup? As stated before, pin 47 is for the BAP sensor. Car should still start.
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Thanks for the response, Mustang 5L5. No this configuration has never run. I did remove the engine from a running car, though. Pin 45 was damaged and when we tried to repair it it broke off. Ron Francis told me that pin 46 was not used so they advised me to remove pin 46 and place it in pin 45's location. BUT, Pin 46 is the ground circuit for several sensors so now I've destroyed the computer based on Ron Francis' advice. Everything seems to function, but now I'm back to square one with no computer. Know where I can get an A9L computer cheap? ? ?
Looks like Autozone has reman units. Pricing is $100-200 or so plus core, but you can give back your current ECU.
As for the wiring issue, it's tough for me to give wiring advice as to how it should work given the custom wiring, as my knowledge tends to be centered on the 87-93 Mustangs. Here's the pinout for an 89-later mass air computer for the 5.0. As you can see, there are a number of pins not used, but pin 46 is probably the most critical.
http://sth2.com/mustang/EFI-Pinout.pdf
How did you damage pin 46 exactly? physically?
As for the wiring issue, it's tough for me to give wiring advice as to how it should work given the custom wiring, as my knowledge tends to be centered on the 87-93 Mustangs. Here's the pinout for an 89-later mass air computer for the 5.0. As you can see, there are a number of pins not used, but pin 46 is probably the most critical.
http://sth2.com/mustang/EFI-Pinout.pdf
How did you damage pin 46 exactly? physically?
Actually, pin 46 was damaged by me after Ron Francis Wiring told me that it was not used and I should try to remove it and put it back into pin 45 which their harness damaged. Of course, they deny that their connector could have damaged it. But, the computer was okay until it was plugged into their harness. The issue with the computer is that it had been remanufactured before, and the connectors were glued together. Therefore, there was no way for me to get to the rear of the connector which is where the pins are removed and inserted. So, I damaged it by removing it. I sent the computer off today to a company that thinks that they can repair it. It is now just a physical repair as I think that the logic on the pc board is okay. I appreciate your interest in my dilemma. Hopefully, this repair will end the saga.
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