The Fuel Pressure Regulator (FPR) should have a schrader valve (like a bicycle tire) on it. Screw on a fuel pressure gauge to the schrader valve and start the engine. The needle will probably jump up and down. Watch where the low and high readings are and go with the middle reading as a starting point.
If you don't get a reading of at least 60psi at idle, the FPR may need adjusting. In the 94.5 - 97 thread, we call it an "FPR Shim". Go to our thread and search on "FPR Shim". You'll get plenty of reading material and info (with pictures) to do this.
Basically, we added a BB to increase spring tension. This brings the fuel pressure into spec.
As an example, my '97 F350 had a pressure reading of about 40psi. I added a BB to the FPR. The fuel pressure raised to 70psi. The engine idles smoother and throttle response is fantastic.
I bought a fuel pressure gauge from NAPA. It says to not use it for diesel. It isn't permanently connected to my truck, so I didn't worry about it. It screws onto the schrader valve and reads fine. Get the 90* adapter if there isn't alot of room.
DO NOT ADD THE BB WITHOUT KNOWING "BEFORE" YOUR FUEL PRESSURE. TOO MUCH FUEL PRESSURE IS NOT GOOD.
__________________
Craig "IDMooseMan" Peters
1997 F-350 XLT 4x4 CC LB E4OD 4.10:1
FPR Shimmed to 70 PSI, 6637 Upgrade, ICP Resistance Mod, DiamondEye 3" Downpipe and 4" Exhaust
USAF SSgt 1983 - 1992
NAHC Life Member
1991 Wilderness 24M
My '97 7.3-liter PSD requires a minimum of 40psi and a maximum of 80psi at the FPR. The closer to 80psi, the better.
Did you check the cable connections at the battery, starter relay and the starter? If they're loose, the starter won't engage and the engine won't turn over.
I think the fule presure is less witha michanicle lift pump like he has could be wrong though
__________________
94 F350 Crew Cab Long bed 4X4 7.3L IDI Factory Turbo, AKA The Land Yacht. E4OD, 4.10 posi. Getting further from stock with 35 inch BFG alterains on 16 inch micky's, straight pipe, Triple A-piller pod with pyro, boost, modifyed stock oil presure gauge, tc lock light&switch
__________________
94 F350 Crew Cab Long bed 4X4 7.3L IDI Factory Turbo, AKA The Land Yacht. E4OD, 4.10 posi. Getting further from stock with 35 inch BFG alterains on 16 inch micky's, straight pipe, Triple A-piller pod with pyro, boost, modifyed stock oil presure gauge, tc lock light&switch
Last edited by George D. : 02-02-2008 at 05:52 PM.
Not offended I was refering to IDMooseMan saying he had a mechanicle lift pump I was wrong about the psi needed to start. I thought he had an electric pump but you both have mechanicle lift pumps.
__________________
94 F350 Crew Cab Long bed 4X4 7.3L IDI Factory Turbo, AKA The Land Yacht. E4OD, 4.10 posi. Getting further from stock with 35 inch BFG alterains on 16 inch micky's, straight pipe, Triple A-piller pod with pyro, boost, modifyed stock oil presure gauge, tc lock light&switch
do you have an idea on what i should do? I am at the point of trying to find a shop that can try to fix it in the area. I am also hearing that the soy diesel can toast injectors do you know anything about that?
We have a wise Int shop about 30 min from us but they charged my boss 1400 for a glow plug and a transfer fuel pump on our 1999 INt box truck, that just scares me to death I don't have that kind of money. I also don't want to take it to a shop who is just guessing at what the problem is.
I would call first and get them to give you some kind of quote for diagnosing it and to see it they'll even work on a non fleet vehile some IH dealers will some wont. But the labor rate is pretty high the IH dealer I work at is $105 an hour. You may want to see if theres any small shops near you that could look at it they may be cheaper but may not know what there doing but the IH dealer may not either. But it also may cost you more in buying tools to check it out than to have it fixed of coures you'd have the tools for next time.
As for the soy fule as I understand it bio is no bueno in the navistar counterparts and kills warenty on injectors and such.
And if the box truck had the T444E the lift pump is bitch to get too and I think pays like 3 hours pluss parts. and depending on the setup and what side the glow plug was on theres a bit of stuff in the way but 1400 seems kinda steep.
__________________
94 F350 Crew Cab Long bed 4X4 7.3L IDI Factory Turbo, AKA The Land Yacht. E4OD, 4.10 posi. Getting further from stock with 35 inch BFG alterains on 16 inch micky's, straight pipe, Triple A-piller pod with pyro, boost, modifyed stock oil presure gauge, tc lock light&switch
Just had a thought Do you have oil presure when cranking?
__________________
94 F350 Crew Cab Long bed 4X4 7.3L IDI Factory Turbo, AKA The Land Yacht. E4OD, 4.10 posi. Getting further from stock with 35 inch BFG alterains on 16 inch micky's, straight pipe, Triple A-piller pod with pyro, boost, modifyed stock oil presure gauge, tc lock light&switch
yes it takes it 2 or 3 cranks but it climbs all the way up to 3/4 the way up
still sounds electrical,check here http://arrc.epnet.com/autoasp/framerq.asp for a diagram on top right you will see three fuses,two relays and a diode that can control fuel
__________________ Ray
2000 F-350 2WD,DRW Auto, PSD,
DP Tuner,40 Tow 80E,Wicked Wheel 4" Exhaust ,AIS intake, Guages,6.0 Trans cooler to install
DooDad???=(dfuser ram air)
'98 Grand Cherokee
'86 F-150 SB Lariat 4x4 bought new (needs new home)
PAA #35
Join Our Site - Its free, quick and easy!
