What's causing my 91 Buick regal to shut off while driving( on 1991 Buick Regal

It cuts off after maybe 15 mins of driving. Then takes an hr or more to restart. Could this be a tension belt problem or something else. Please help cause I'm clueless.

2 answers
when push gas pedal engine shuts-off but starts right back-up
DO YOU HAVE ANY ENG CODES? COULD BE MASS AIR FLOW,CRANK SENSOR OR IGNITION MODULE.SEEK DIAG AS NOT TO WASTE TIME AND MONEY