Quote Originally Posted by crhatchzc
yeah im using a obd0 to obd1 harness but i was also wondering there was a ls in the car before i bought it from this guy he pulled the motor out but left his ecu pluged up now do you have to repin for a obd0 ls ecu to work with a ls swap in a ef

you dont need to repin nothing on the ecu harness....only time when u repin and add pin's in is when your doing a dpfi into mpfi....even if you had a dx ef and wanted to go obd1, u still have to pin in the injectors....so if u had a obd0 ls ecu and plugs in the ecu harness, it works, and if u use obd0 to obd1, ls ecu should work with the obd1 p75 that is...!