i've bought a RP ECU from a forum member and when installed the car wont start. it will turn over. I put the stock ecu in and started first time. I remember another post where another guy was having the same problem.
i looked on both ecu's and the RP ECU has N3A1 on it and my stock ECU has N3C1 on it. now the car it came out of was a 93 and mine is a 94. now i've heard about a 94 ecu in a 93 chassie throwing a check engine light b/c of the EGR valve and extra emissions. but i have yet to see or hear a 93 ecu in a 94 chassie. I think why my car wont start is b/c of the extra emissions not being controled/accounted for during start up. please can anyone help with this problem. i've sent a pm to the seller to help with the problem or money back(hopefully he is a good preson)
thanks for any help

 

which codes is it throwing?

 

I would suggest contacting RP. While you didn't buy the ECU directly from them, they typically will help as much as they can.

 

yeah i'm calling them as soon as they open.

 

I have a 94 running a Pettit RP ECU 93 and have no problems with it. In fact since the 93 ECU doesn't look for an EGR input this can't be your problem. I would suspect a DOA ECU. With the 93 ECU you can even remove the electronicly monitored EGR and install a block off plate. Jack

 

i talked to roarty performance and the problem is that two ecu codes don't match. the N3A1 and the N3C1. i guess both years had two different ecu codes and they have to match in order to make the car run. if i was to walk up to a car with an stock ecu that has N3A1 marked on it if i put the RP ecu in it should run fine.