i have a 06 f150 king ranch 4x4 67,000 miles 5.4L... i have recently just started having this problem..it turns over and engine fires but it sounds like it may starving for fuel..as soon as the engine fires it dies and the screen on the dash cluster says low oil pressure then you can start it again and it fires and runs fine..always runs fine and idles fine just cranks crappy whenever it wants sometimes a couple times a day and then runs fine other days..i havw always owned a diesel and done all my maitnence myself but i know nothing about this truck..i replaced the fuel filter yesterday and thought it had the problem fixed but this morning its done it once again...what do i do?