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#1
10-05-2012, 01:35 AM
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Fuel pressure ?
I've been slowly noticing that my fuel pressure will drop. At first only at WOT and lost 10-15#'s. My FICM programmer came in yesterday and I loaded the 40 tune and drove. Truck drives great and throttle response is awsome--but at WOT it falls on its face--looked up at the gauge and it was at 20#'s So I stopped at NAPA and got one of their pumps, installed it and the same thing. I have a RR from Dozers Diesel--Still uses the stock front lines and filter bowl--caps off the return port and new lines from the rear of the heads to the reg. and back to stock return line. i changed the upper filter as well. Maybe something in the tank restricting it from sucking fuel?? Without the FICM tune it still dips down past 30. Stock injectors---I have had problems with stiction on number 7, but a fresh oil change with T-6 and a bottle of archoil and it has been fine the last couple days. Any thoughts?
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2005 250 crewcab king ranch arps, egr delete,coolant and oil bypass filters 4" turbo back MBRP A-1000 fuel w\Reg return Warrne 175\30's 
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#2
10-05-2012, 02:03 AM
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Re: Fuel pressure ?
You have the updated FPR kit installed? I assume your filters have been replaced.
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#3
10-05-2012, 10:31 AM
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Re: Fuel pressure ?
Regulated return and fresh filters
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#4
10-05-2012, 12:12 PM
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Re: Fuel pressure ?
I've heard alot about the blue spring upgrade. You may want to look into that.
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#5
10-05-2012, 01:46 PM
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Re: Fuel pressure ?
Napa pump? Aftermarket pump or a stock pump from napa? Anyway u should be around 50-70psi. Weak pump maybe....what kind of filters u using?
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190/100's,adrenaline hpop,powermax,arp's,58v idp modrate tuned ficm,extreme x,5'' exhaust,afe stage3,coolant filtration,oil bypass,egr delete,airdogII 165,6.4 banjos,sump,egt's/boost/trans/fuel gauges.
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#6
10-06-2012, 12:23 PM
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Re: Fuel pressure ?
Motorcraft filters. It was the original pump with 150,000 miles on it, so I switched it out with the napa pump and its doing the same thing which makes me think its not the pump. I just ordered a sump from XDP. my plan was to run the stock pump with an airdog and sump. I'll put that in on monday when it gets here. If its not that than I guess i'll look at the regulator up top.
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#7
10-22-2012, 11:06 PM
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Re: Fuel pressure ?
you ever get the truck figured out?
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#8
10-22-2012, 11:36 PM
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Re: Fuel pressure ?
Probably was a squashed regulator spring with 150,000 miles worth of cycles to it?
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2006 F250 Lariat SC 4X4, ScangaugeII,CAT EC-1,Sinister coolant filter,blue spring, Atlas40, Updated Turbo lines/stc/standpipes/dummy plugs, DC Power 190 alt., 4"exhaust straight piped, Amp Steps,Optima Blue Tops,7"fabtech lift w/D&R Coils,Rancho RSX9000,Toyo MT 38/15.50/18. 168 lbs of Dyna-Mat,Also 200 lbs of foam rubber under cab and firewall.
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#9
10-26-2012, 08:56 PM
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Re: Fuel pressure ?
No. I oredered some 175\75 injectors from warren so I decided to make sure I didn't have any other problems
 2012-10-25 13.35.29 by Heath_Runkles, on Flickr Napa bases and filters through a A-1000 sucking from a XDP sump and -8an 1\2" line all the way up to the motor.
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#10
10-26-2012, 09:22 PM
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Re: Fuel pressure ?
do you have the guts out of the original fuel bowl regulator?
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