We have a '96 Pace Arrow on that F53 Ford chassis. That fuel pump has a distinct sound when it's running. When you put the key in the start position anyone standing by or just behind the rear tires should be able to hear it running. If the pump is running check the frame rail fuel filter, mid way between the rearend and the motor on the drivers side frame rail on the inside between the two rails. Those intank pumps were bad about going out. If it's running you can add an inline pump just behind the frame rail filter and avoid that drop the tank replace the pump hassel. Ours is fuel injected and after I did the add on pump no more problems.... PM me if you need the plans for that add on pump, I got 'em from a forum member here and it's easy if you can use a few hand tools...........