I have a 2001 accord ex coupe with an h22a4 swap. The car is running off the accord ecu. I do have a 99 prelude ecu obd2. What do I need to run that ecu, a underdash harness or a obd2 jumper harness? Please help.

 

ur gonna need to get a obd2a to 2b jupmer harness to run the 99 preldue ecu, plus if its a udsm ecu ur gonna have to figure out how to bypass the immobilizer

 

Thanks alot for the info.