Dfroman
Jr. Member
- Joined
- May 11, 2011
- Messages
- 135
Hello All,
Will try to keep this short. Everything was working fine until I had to remove and rebuild my steering column. When I put it back together the fuel pump was not coming on.
I was tracking down my fuel pump issue (turned out to be the inertia switch)
While I was trying to figure out if the relay was getting powered, I put 12volts to something that I should not have and it burned pin 46 trace in the ECU. I know that because I just dropped it off to have it repaired. I knew something was wrong with the computer because it would not go into selftest mode. I got a new A9L computer from NAPA and it ran fine for about 10 miles and then it started back firing and running terribly (had to pull over at one point to let traffic die down so I could finish limping home)
I fear that I may have damaged some wiring when I fried the first ECU. I am not sure if it was dumb luck that I got a bad computer or if something is wrong. I do not want to fry the original ECU after it gets repaired.
I have the RJM efi harness.
So the question is how do I test the wires in the harness for pin 46? Literally how to do an Ohm test and what are the numbers that are inline and out? I put everything together, so I can follow directions. I tried some searches on the foxbody forums and really didnt come up with anything that made sense to me.
Thank you
David
Will try to keep this short. Everything was working fine until I had to remove and rebuild my steering column. When I put it back together the fuel pump was not coming on.
I was tracking down my fuel pump issue (turned out to be the inertia switch)
While I was trying to figure out if the relay was getting powered, I put 12volts to something that I should not have and it burned pin 46 trace in the ECU. I know that because I just dropped it off to have it repaired. I knew something was wrong with the computer because it would not go into selftest mode. I got a new A9L computer from NAPA and it ran fine for about 10 miles and then it started back firing and running terribly (had to pull over at one point to let traffic die down so I could finish limping home)
I fear that I may have damaged some wiring when I fried the first ECU. I am not sure if it was dumb luck that I got a bad computer or if something is wrong. I do not want to fry the original ECU after it gets repaired.
I have the RJM efi harness.
So the question is how do I test the wires in the harness for pin 46? Literally how to do an Ohm test and what are the numbers that are inline and out? I put everything together, so I can follow directions. I tried some searches on the foxbody forums and really didnt come up with anything that made sense to me.
Thank you
David
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