1997 Ford f250 over 8500, no start.
 

Thank you in advance for any help. It is a 1997 Ford f 250, 5.8l gas over 8500 gvw, non obd2. I drove it about a mile, turned it off for about a hour and when I went to start it, it ran for about 5 seconds and shut off. It has 2 gas tanks one has a new fuel pump. It turns over, but I don't hear the fuel pumps turning on. Has gas in both tanks. The button on the passenger side is pushed down. The fuses aren't blown, I can hear a click when I turn this key,just not the pumps. The fuel filter was changed about 2 years ago, fuel injectors, gas line, gas tanks . new rear gastank and pump a few months ago. Would a crank shaft position sensor do that? Thanks again for any help.

Mike.