I'm putting in a D16z6 in my '89 CRX Si and i just ordered a P28 ECU and a Mugen chip. What do i need to do to hook up the P28 in place of my Si ECU. Some kind of adapter... do i have to repin it?

 

If you are using the P28 ECU in ur '89 CRX the plugs are not going to just plug rite in. I don't know if anyone makes a convert like the OBD1 to OBD2 and OBD2 to OBD1. If not i think it would just be easier to rip out your existing non OBD interior wiring harness and throw one in from a 5th gen Si or EX. Hope you can find an easy way to do it!