1991 buick suddenly stalls when warmed up!?

sounds like something is getting too hot. it should be like my oldsmobile with a coil pack sitting on the module. check the plug-in on the module to make sure it,s not corroded or loose. does it stall while your driving or just sitting still? it could be the pump relay sticking and shutting down the pump. another thing it could be is the ignition switch going bad.