I have a major screwed up issue, My friends car, a 2000 Pontiac Sunfire 2.2 had check engine light on, codes were a upstream O2 sensor and a Crank Position sensor, I replaced both , cleared the codes and drove car around , all was good . The other day they went to add Freon to the a/c unit and the car stalled and cranks but will not start, and the turn signal indicator lights on the dash are on steady , even with the key off. all happened at time of stall . So I brought my scan tool home from work to check for codes and such , plugged it into the car , hit the key and it fired up and ran, kinda rough but it was running , while i was getting into the live data to see what was going on the wire on my scan tool got super hot , I pulled the cable out of the obd2 connector and the car stalled and cranks but wont start . I replaced the PCM with a used unit today and everything is the same . I am at a loss and getting frustrated . Please help if you can .

Cars & Trucks - Pontiac