fuel psi - Ford Powerstroke Diesel Forum
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post #1 of 13 Old 05-07-2012, 08:04 PM Thread Starter
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fuel psi

what should a normal fuel psi be on these trucks min and max

1997 F 250 4x4 quad cab
fpr mod
straight pipe exhaust
3in downpipe
triple gauge pod pillar mount
fuel p.s.i./boost/egt
6" single stack
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post #2 of 13 Old 05-07-2012, 08:16 PM
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I'd say 45 is a min, max maybe 70-75



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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post #3 of 13 Old 05-08-2012, 07:50 AM
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so if mine is running but only pulling 15 psi, its a pretty safe bet its a bad fuel pump , right?
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post #4 of 13 Old 05-08-2012, 08:46 AM
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Quote:
Originally Posted by TOW RIG View Post
so if mine is running but only pulling 15 psi, its a pretty safe bet its a bad fuel pump , right?
Or fpr, or fpr screen, or fuel pick up assembly

I made my Samsung SGH-I997 send this.



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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post #5 of 13 Old 05-08-2012, 10:04 AM
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With it that low I personally would not drive it until you found the issue or you'll be replacing injectors soon. When was the last time both fuel filters were replaced?

SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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post #6 of 13 Old 05-08-2012, 06:39 PM Thread Starter
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both? filters i feel stupid asking but where is the other one.

1997 F 250 4x4 quad cab
fpr mod
straight pipe exhaust
3in downpipe
triple gauge pod pillar mount
fuel p.s.i./boost/egt
6" single stack
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post #7 of 13 Old 05-08-2012, 06:42 PM
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there's only one fuel filter on OBS. It's the in the engine valley.

1997 PSD Crew Cab Shorty Centurion Flatbed 234k D60 Swap
Leather Interior, built in radar detector, 5 inch dozer stack, DIY exhaust brake/TC lockup

1997 F-250 PSD ZF5 4x4 RCLB 362k SOLD

1953 Clark Carloader Forklift
1996 Subaru Legacy Wagon
2001 Big-Tex 16' Landscape Trailer
2006 Suzuki King Quad 750 27 inch ITP Mudlites
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post #8 of 13 Old 05-08-2012, 06:43 PM Thread Starter
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also what cause it to differ on start up by 10 to 25 psi

1997 F 250 4x4 quad cab
fpr mod
straight pipe exhaust
3in downpipe
triple gauge pod pillar mount
fuel p.s.i./boost/egt
6" single stack
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post #9 of 13 Old 05-08-2012, 06:44 PM Thread Starter
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i thought so but thought i was missing something

1997 F 250 4x4 quad cab
fpr mod
straight pipe exhaust
3in downpipe
triple gauge pod pillar mount
fuel p.s.i./boost/egt
6" single stack
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post #10 of 13 Old 05-08-2012, 06:51 PM
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it's mechaincally driven pump off the cam so things can be sort of low when it's going off starter speed, also if your pump is bad it can give really lower pressures

1997 PSD Crew Cab Shorty Centurion Flatbed 234k D60 Swap
Leather Interior, built in radar detector, 5 inch dozer stack, DIY exhaust brake/TC lockup

1997 F-250 PSD ZF5 4x4 RCLB 362k SOLD

1953 Clark Carloader Forklift
1996 Subaru Legacy Wagon
2001 Big-Tex 16' Landscape Trailer
2006 Suzuki King Quad 750 27 inch ITP Mudlites
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