Converting from OBD0 to OBD1

ASSISTANCE Hybrids & Advanced Aftermarket Engine Performance
1

Hey guys,

I’m going through a ground up rebuild on my DA. The car that I have is a 91 obd0 with an AUTOMATIC transmission (that I’m swapping a obd1 ls/v into). I’m planning on converting to manual, and a guy I know has an obd1 DA that he’s parting out (With manual transmission).

I’ve read all over that I can just get a jumper harness to run obd1, but I’d also have to modify the wiring to run a manual tranny, and modify the wiring for the distributor. So in an essence, I figure the reasonable thing to do it just swap the wiring out completely. I know it will be more time consuming, but a solid OEM wiring makes me feel alot better than hacking apart my current one. I’m pulling my entire interior so thats a non-issue.

A few questions:

What are the differences between obd0 and obd1 harness for these DA’s? I don’t have cruise, ac or anything fancy. So will all my sensors plug and play accordingly?

Thanks!

  • Brandon

P.S. - I’ve been searching g2ic, clubintegra, honda-tech, jdmcity and google for 6 hours now. Nobnody ever states solid that they did this with no issues.

2

You kinda just figure things out and things make more sense as you go along with your work. But rywire has a kit for that! it was like 190 when i bought it. the kit comes with the ecu adapter, distributor adapter, and vtec wires.
you’ll only want to use that ecu from the obd1 DA if it’s a vtec car, you can pick a like a pr3 ecu, pr another vtec ecu pretty cheap.