low rail pressure

B585Ford · Nov 29, 2013

Sledpull said:
A billet fuel pressure cap with a hose connected to gauge ran into the cab and take it out and floor it. If I goes to 0psi the lpfp is junk. If it stays at 1psi or above you probably need a hpfp. The lpfp goes you may be able to replace it and fix the situation. But the hpfp may already be damaged and you'll end up replacing them both.

Thanks. I am trying to figure this out before I go to duals to see if I can keep my HPFP and just buy 1 instead of 2. If you happen to sell a billet fuel pressure cap that will work, send me a PM.

B585Ford · Nov 29, 2013

Sorry if I confused anyone, I don't ever have low RP, just a surge.
OP, sorry for the derail.

Morgan@Midwest Diesel & Auto · Nov 29, 2013

B585Ford said:
Thanks. I am trying to figure this out before I go to duals to see if I can keep my HPFP and just buy 1 instead of 2. If you happen to sell a billet fuel pressure cap that will work, send me a PM.

Billet fuel caps I am waiting on more. As soon as I get some I'll let your know. I think they are around a $100 a piece but you can get the kit with all three for all the filters for less than $300. I'll find out Monday when they are getting here.

1sicpsd · Nov 29, 2013

I'm throwing p2291 and p0087 only thing i have on my truck is mini max its going to the dealer tuesday gonna try getting them to replace my hpfp

B585Ford · Nov 30, 2013

1sicpsd said:
I'm throwing p2291 and p0087 only thing i have on my truck is mini max its going to the dealer tuesday gonna try getting them to replace my hpfp

Did you ever monitor your "fuel flow"?

hoosierdiesel · Nov 30, 2013

HPFP from Ford ran 1400 before discount... Right around 1200 or so for labor.

1sicpsd · Dec 1, 2013

no not really now that my programer is not installed its triping any codes

B585Ford · Dec 1, 2013

1sicpsd said:
no not really now that my programer is not installed its triping any codes[/intact

So now you are running no programs? If so, have you been running with DPF still intact when you had the programmer or did you swap the exhaust?

1sicpsd · Dec 2, 2013

nope i was all stock with dpf and had the codes with the programer H&S. took H&S off no codes. i just put a intake on today. ill pry install my H&S tomorrow and see how it goes.

B585Ford · Dec 2, 2013

1sicpsd said:
nope i was all stock with dpf and had the codes with the programer H&S. took H&S off no codes. i just put a intake on today. ill pry install my H&S tomorrow and see how it goes.

OK, I want to make sure I have this straight. You were running with your DPF on. Which H&S do you have (street or race)? Are you positive the tunes you are using are for DPF on?

1sicpsd · Dec 3, 2013

running dpf on, it is H&S street unlocked and yes positive

B585Ford · Dec 3, 2013

1sicpsd said:
running dpf on, it is H&S street unlocked and yes positive

So right now you are kinda in bind because it won't throw codes with no programmer and you can't take it to Ford with the programmer. Have you tried using the MM just to monitor. ICP is rail pressure on the MM.

1sicpsd · Dec 4, 2013

i have a street unlocked race something. yes it was with dpf tunes on. had it down @side action diesel and we took it for a ride and he noticed right away from the gauge that it went down and back up. fuel pressure that is. he said its either the pig tail or the hpfp. I'm taking it back to ford on monday to have them look and try to replace it.

B585Ford · Dec 4, 2013

1sicpsd said:
i have a street unlocked race something. yes it was with dpf tunes on. had it down @side action diesel and we took it for a ride and he noticed right away from the gauge that it went down and back up. fuel pressure that is. he said its either the pig tail or the hpfp. I'm taking it back to ford on monday to have them look and try to replace it.

Good luck