I have a 2004 f-550 that will not start when engine is Hot starts great whens its cold but at operating temps my presseur is around 270psi unless i crank for over a minute, i have changed high pressure pump, dummy plugs rail supply tubes, other then the hard hot start truck runs awesome just a real pain to leave truck run 12 hours a day or longer is it posible my injector oil inlet o-rings are failed? can i change just them with out removing injector please help ive put thousands into this truck and it would be nice to get it running prime.