mugenhatchie

Alright guys, searched, read, confused. I have 1990 civic SI that is completely missing the engine harness (unplugged not cut). I know the Si had a MPFI engine in it. My question is what replacement harnesses can I use that would be a plug and play to the existing wiring? I have heard everything from Integra harnesses to CRX HF harnesses will work as long as they are MPFI. I just want to make sure before I drop some money on a harness that may be worthless. Also the motor I am going to be swapping in is my old B18C1 out of my wrecked EG, so it's obd 1. Assuming I get the Si engine MPFI harness replaced, could I just get a Boomslang OBD0-OBD1 conversion harness and then just wire in VTEC? Would I have to change some of the plugs on the engine harness to that ones on the OBD 1 EG harness so it will plug in correctly to the motor? I appreciate all of your guys help. This is my first obd 0 car so it is kind of new to me. All I have had before were EG hatches and the wiring on those is so much easier. Thanks!

Loserkidwac

well it is always suggest to get the stock harness where ever possible so I would look for a 90 Si harness, I'm pretty sure the HF will not work properly and not sure on the teg but save some hassel and just get a harness from a 90 Si, as for the OBD0-OBD1 use the OBD0 harness for the car (90 Si) everything except the vtec stuff will plug right in they use the same connectors/plugs other than the fan switch OBD0 has it on the back fo the block OBD1 has it on the thermo housing...you could just run the motor with a chipped pm6 on turbo edit but if you want to go OBD1 just use the conversion harness

mugenhatchie

Thanks man you are awesome!