Fuel Pressure ? - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 03-21-2013, 03:51 PM Thread Starter
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Fuel Pressure ?

I turned up my fuel pressure to 60psi on my regulated return. Now the truck is really hard to start. At 40 psi it cranks fast and strarts in a few cranks. Is this a normal problem?

99 F250 Ext Cab 4x4 Auto
4" turbo back dual exhaust
AFE Stage 2 intake
Auto Meter Gauge
GDS Ball Buster Turbo
6.0 intercooler
Dfuser 18K module
ATS Stage 3 tranny/ 5 star converter and copilot
FASS 150
Reg fuel return
Fluidamper
Studded, springs, pushrods
Adrenline HPOP
Full Force 238cc Injectors
PHP Chip 1000 high idle,65tow,80econo,100htst,120race,140extreme
PowerSlot Rotor n Hawk Pads
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post #2 of 9 Old 03-21-2013, 04:57 PM
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factory minumum is 45psi. So if ur run'n 40psi, then a few WOT runs, who knows what it read then...

99.5 x-cab 7.3l, 6spd, 161k miles.....
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post #3 of 9 Old 03-22-2013, 11:54 AM Thread Starter
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I have a fpg in the cab. At 45psi on the lower tunes i dont have a problem. I had the fuel pressure at 65 and the dam thing draws way down on the batteries when it cranks and wont start. It did the same thing with the fass on it.

99 F250 Ext Cab 4x4 Auto
4" turbo back dual exhaust
AFE Stage 2 intake
Auto Meter Gauge
GDS Ball Buster Turbo
6.0 intercooler
Dfuser 18K module
ATS Stage 3 tranny/ 5 star converter and copilot
FASS 150
Reg fuel return
Fluidamper
Studded, springs, pushrods
Adrenline HPOP
Full Force 238cc Injectors
PHP Chip 1000 high idle,65tow,80econo,100htst,120race,140extreme
PowerSlot Rotor n Hawk Pads
285 Nitto Terra Grapplers
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post #4 of 9 Old 03-23-2013, 06:00 AM
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where you test'n fpr at...d/s or p/s of fuel bowl?

99.5 x-cab 7.3l, 6spd, 161k miles.....
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post #5 of 9 Old 03-23-2013, 05:10 PM Thread Starter
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The in cab fpg is wired in at the fuel pressure reg on the regulated return.

99 F250 Ext Cab 4x4 Auto
4" turbo back dual exhaust
AFE Stage 2 intake
Auto Meter Gauge
GDS Ball Buster Turbo
6.0 intercooler
Dfuser 18K module
ATS Stage 3 tranny/ 5 star converter and copilot
FASS 150
Reg fuel return
Fluidamper
Studded, springs, pushrods
Adrenline HPOP
Full Force 238cc Injectors
PHP Chip 1000 high idle,65tow,80econo,100htst,120race,140extreme
PowerSlot Rotor n Hawk Pads
285 Nitto Terra Grapplers
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post #6 of 9 Old 03-23-2013, 06:23 PM
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i have mine set at 65 all the time....does that mean i have it set to high?

DONE:
EGR delete--4" turbo back exhaust
75HP tune
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post #7 of 9 Old 03-23-2013, 06:39 PM
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I highly doubt high fuel pressure is the issue.

And 65 is not high.



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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post #8 of 9 Old 03-24-2013, 07:36 AM Thread Starter
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That's what got us confused. This happened with the fass to. The higher we went with the pressure the harder it gets to crank and at 65psi it kills the batteries before it'll start. At 45 it'll crank all day and fire right up.

99 F250 Ext Cab 4x4 Auto
4" turbo back dual exhaust
AFE Stage 2 intake
Auto Meter Gauge
GDS Ball Buster Turbo
6.0 intercooler
Dfuser 18K module
ATS Stage 3 tranny/ 5 star converter and copilot
FASS 150
Reg fuel return
Fluidamper
Studded, springs, pushrods
Adrenline HPOP
Full Force 238cc Injectors
PHP Chip 1000 high idle,65tow,80econo,100htst,120race,140extreme
PowerSlot Rotor n Hawk Pads
285 Nitto Terra Grapplers
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post #9 of 9 Old 03-24-2013, 08:46 AM
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I'd check your batteries, or ICP.



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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