truck starts&runs great 1day,next day,hart to start&will cutoff on the hway at65

THANKS BOB,WHEN THE ENGINE CUTS OFF ON ME,I TRY TO RESTART,IT KEEPS CRANKING&WON'T START,I SWITCH TO MY OTHER TANK,IT STILL JUST CRANKS,I KEEP TRYING 4 AFEW MIN.TURNING THE IGNITON OFF&ON FINLEY IT STARTS UP,&ROLLN.DO YOU THINK IT COULD BE A RELAY?CAN'T BELEIVE I SCREWED-UP TWO FUEL PUMPS,HUH ANYMORE HELP IS APPRECIATED,TOWE

You will need to call me or have your vehicle towed here. Thanks Bob - 703-845-8477