johnjw

92 CX w/97 B18b1, recent swap. Used Integra engine harness with civic chassis harness into an OBD-1 P75 ECU.

Only after warming up will it cut out at part throttle. If you let off and get back into it, it runs fine until rpm's come back down. Then same issue. The car that the swap came out of ran great, no issues. All stock. The only added variable was the ecu as we could not use the OBD-2 ecu from the integra for obvious reasons. So far the parts we have sub'd are distributors with same results. I tried a 92 Accord EX ecu and the car has never missed a beat. So I took apart the P75 and found Q31 transistor fried. Found another P75 installed it and drove with same cutting out issue. Re-installed the accord ecu and drives fine. WTF?? I picked up another P75 to install tomorrow but am I missing something? The origional CX engine and harness had a 1 wire O2s and the new(er) engine has a 4 wire HO2s but I read the harness are cross compatible.

Please help. Have to drive across country in 3 days.....