my friend has a obd1 motor, and obd2 wiring harness... and i have a obd2 ECU..


is it possible to use an obd1 to obd2 conversion harness.. or do you need the obd1 wiring harness for it all to work?

 

that the whole reason behind a obd1 to obd2 jumper harness so u can go from obd1 to obd2 or vise versa..u can have a obd2 engine harness with a obd1 ecu

 

if you are going to use the obd2 ecu you don't need a jumper harness... but... obd1 motors don't call for as much as obd2 so you may run some checks... i would just use obd2 harness and use the obd2a to obd1 jumper everyone says its better that way...

 

I forgot where I saw them, but they do make them.

But I wouldn't recommend it... stay OBD1 and get yourself a new OBD1 ECU.