1989 F-250

MY FORD F250 WILL JUST DIE ON ME, SPUTTERS A LITTLE AND DIES.

AFTER IT SETS FOR SEVERAL HOURS IT WILL START AGAIN.

I HAVE REPLACED THE FUEL PUMP, HAD THE MODUAL CHECKED, THE TRUCK WILL RUN ON A GAS FILLED RAG IN THE AIR INTAKE UNTIL THE GAS IS GONE OUT OF THE RAG. I HAVE 40 LB OF GAS PRESSURE WITH ENGINE OFF I HAVE 32 LB WHEN ENGINE IS RUNNING.