1990 is obd 1. does not need to be programmed.

forget used, get a new one, they are cheap, you must change the ram chip from your old one to the new one

Roy

i have a 1992 Oldsmobile Cutlass Supreme 3.1. I replaced the crank sensor recently and car ran great. I left the lights on and ran the battery down, recharged battery but now the car runs rough when I put it in gear. the car runs ok when it idles. Do I have to reset the computer? Thanks, MIke