2000 Ford F53, V10 cranks but not starting, & solution

Could be bad computer, it tells the pump when to turn on, control spark, ect. Does this rv have a OBDII port. Get a scan tool and see if you can talk to the computer. Another thing could be a kill switch. I don't know if rv's have them but cars do. When they get in accidents the switch kills the computer and has to be reset.