so about a week ago i replaced the high pressure fuel pump and injectors on a 6.4 do to high amounts of metal shavings i found while replacing the fuel filter and a code that came up after it came in with a lack of power complaint i believe the code was a p0088 or something close to that now the truck is back together after the cab was removed i bled the fuel system and the truck fired right up after roughly 6 to 8 mins of idling the truck shut off and will not refire the wrench light comes on and the code that pops up is a p2291 fuel rail pressure too low i talked to a local ford tech and he told me it was the frp sensor so after a few more hours and some more money the truck still wont start any ideas out there im stuck scratching my head

 

nuts&bolts90, welcome to FTE.

I would start with the fuel filter.

 

Pull the fuel filters again and have a look.

Make sure they are on all the way. No threads showing.

Also bleed all the air out. You can do that by just turning the key to the on position and listening for the low pressure pump.

When the pump shuts off (about 30 seconds) turn the key off and then repeat.

Do this at least 6 times.

Also check your fuel cutoff switch and make sure it is not tripped. It is on the passenger side of the dash. Just right there on the side when you open the door.

 

the fuel cut off is not tripped and it seems to have plenty of fuel to the hpfp both the primary and secondary filters are full of fuel and i have bled the air at the fuel cooler like ford says to no avail im starting to wonder if i didnt get a bad hpfp from the dealership it is a reman after all

 

I think you might be right.

 

Yeah me too...

You buy a part, think it's good off the shelf and come to find out, it's bad or was damaged while shipping.

 

but if it is the hpfp why would the truck fire up and run on the initial start up

 

ok so after i got the cab back off i found the problem was a copper washer on the hfpf i replaced it and got the truck running now after several hrs of double checking and repairing i test drove it it seems to be runnin great but im now gettin a p0096 and a p3030 and the truck seems to take forever to shift and acclerate will no go above 55? any ideas?