you need to check the fuel presure...this sounds like a weak fuel pump...these must have no less then 58psi at all times
i would think you need a new fuel pump
Test Description The numbers below refer to the step numbers on the diagnostic table.
Notice: Do not allow the fuel pressure to exceed 517 kPa (75 psi). Excessive pressure may damage the fuel pressure regulator.
I replaced the fuel pump about a month ago. That was the fourth new pump I have had to put in the truck in about 6 years. What could cause them to go out so often?
it is fairly common to go through a couple...it is hard to find a good one sometimes..nothing causeing it,,,just bad pumps,try a different brand