What causes my buick to stall and stop entirely cool off and start again

Unfortunately - there is NO WAY to 'successfully' guess at it .. This will require hands-on testing by qualified personnel to determine what is failing at the time the engine stalls - keep in mind intermittent failures can be very difficult to diagnose - unless it can be duplicated at the time of testing. Good luck with it! ▪️https://repairpal.com/repair-shops▪️

Hey man so I’m pretty sure that I have your Buick and your right it is a great car but is still having an electrical issue. Did u have any luck when u attempted at all? I’ve replaced the tps and idle air control but I believe it’s a grounding issue on account that the frame is so rusty. Please let me know anything u can.