Sooo, my 88 crx si was totaled and i picked up a 91 Si. Can I just pull the harness with the motor from my 88 and drop it in the 91? I have searched and came across someone with the same problem but there was no answer on it. Should I just cut the ECU out and splice the chipped ecu in?

Thanks for the help

 

seems that they are different... hope this helps
https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/88-91-crx-si-engine-harnesses-all-same-1887181/

 

No it will not work. The wiring between the two is different on both shock tower plugs. You need an 89-91 Si harness (or do an mpfi conversion if your new car is a dx). Same goes for HF, those are also different from an Si.

 

both cars are Si's so i never did mpfi. i have a 91 harness, in the car right now running some bs mini me. Are the jumper harnesses the same for all years? I saw the plug differences for a fast idle..? I want to make it as easy as possible to get the old/new motor in the new car.

 

Yes the ecu jumpers are all the same for 88-91. It's just the way they are routed to the shock tower plugs that changes

 

ok cool im setting up to swap them out tomorrow so that should make it alot easier