I own a 88' civic dx with a 91' integra motor in it. I have a pr4 ecu with a mugen chip in it. Me and one of my buddies did the swap and wiring conversion from dual point to obd-0 ourselves and as far as I know it is all correct ive checked it over and over again. With the mugen chip in the ecu the car throws code 10 which is air intake temp and with the factory chip in the ecu the car throws code 1 which is oxygen sensor. CAN SOMEONE PLEASE HELP ME WITH THIS!!!!!!

 

is your o2 sensor properly wired up?

Try eliminating the code with the factory ecu first before throwing the mugen one on it unless the mugen will bypass it.

 

the mugen chip bypasses the o2 sensor.......but i will check this once again to make sure, got ne more suggestions.