Low fuel pressure.... Sometimes? - Ford Powerstroke Diesel Forum
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post #1 of 22 Old 02-21-2012, 02:32 PM Thread Starter
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Low fuel pressure.... Sometimes?

Just as title says. I have the blue spring mod and usually I have around 67psi and at WOT it will drop to around 60ish psi. But sometimes if I get on it when cruising down the highway it will drop to the teens. Zero once!! This has happened about four times now. If I let off and ease into it I get pressure back. Its been in the 30s so it's not gelling.

Does this sound like the pumps on its way out or more like a sticky regulator?

Thanks.

2004 F250 CCSB King Ranch
4" MBRP Turbo Back Exhaust
Insight CTS with Fuel PSI and EGT Sensors
SCT with Gearhead Tunes and more to come
Gryphon FICM Programer
IPR Gen2 EGR Delete
ARP Headstuds with OEM Gaskets
Sinister Coolant Filter and ELC
Redhead Steering Box
285/75R16 Cooper Discover ST Maxx tires

And the wish list keeps getting bigger!!
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post #2 of 22 Old 02-21-2012, 03:09 PM
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What gauge are you running is it going through the CTS or a different gauge.
2 stroker

06 F350 4x4 PSD Lariat FX4 CC LB
Edge Insight CTS Expandable Pyro
AutoMeter Fuel Pressure Gauge
Updated Fuel Reg. Kit 3C3Z-9T517-AG
Amsoil By-Pass(Amsoil 5w40)
Delo ELC Coolant
Coolant Filtration System
pulling a 14,000 lb Alpenlite 5er
97 F350 4x4 PSD CC LB
PacBrake&ATS converter lockup
3" dp 4" exhaust
TruCool 28,000 lb cooler
Tymar Intake
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post #3 of 22 Old 02-21-2012, 03:15 PM
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^^^^Yes what gauge are you using?


05 F250 CCSB 4X4, 05 VW TDI
4"Banks Turbo Back, ARP Studs & OEM Gaskets,
Coolant Filter, Blue spring, Zoodad
Bypass Oil Filter, Kitty By By, Standpipes dummy plugs
BPD oil cooler, EGR Delete, CCV Mod, BPD Oil Cooler, SCT SF3

http://www.powerstroke.org/forum/gen...-endeavor.html


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post #4 of 22 Old 02-21-2012, 05:17 PM Thread Starter
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Through my CTS. Are the known to read funny?

2004 F250 CCSB King Ranch
4" MBRP Turbo Back Exhaust
Insight CTS with Fuel PSI and EGT Sensors
SCT with Gearhead Tunes and more to come
Gryphon FICM Programer
IPR Gen2 EGR Delete
ARP Headstuds with OEM Gaskets
Sinister Coolant Filter and ELC
Redhead Steering Box
285/75R16 Cooper Discover ST Maxx tires

And the wish list keeps getting bigger!!
harlo is offline  
post #5 of 22 Old 02-21-2012, 05:48 PM
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I have a feeling mine is on its way out just sometimes it feels really sluggish and won't smoke or anything then sometimes it's balls to the wall poor out the smoke and away i go and it started this not much longer after my blue spring mod


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230k on the clock, 6.4 banjo bolts, blue spring mod, sct xcal3 looney wild, diamond eye 5in turbo back exhaust, airaid cai, edge insight cts
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post #6 of 22 Old 02-21-2012, 05:50 PM
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And I got a fuel pressure test kit and but with having to take a bunch of stuff apart I only tested with key on motor off and only seen 50 psi


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230k on the clock, 6.4 banjo bolts, blue spring mod, sct xcal3 looney wild, diamond eye 5in turbo back exhaust, airaid cai, edge insight cts
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post #7 of 22 Old 02-21-2012, 06:13 PM
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Could be a failing sensor. When it drops to zero does the truck shut down? That's what I'm wonderring.


05 F250 CCSB 4X4, 05 VW TDI
4"Banks Turbo Back, ARP Studs & OEM Gaskets,
Coolant Filter, Blue spring, Zoodad
Bypass Oil Filter, Kitty By By, Standpipes dummy plugs
BPD oil cooler, EGR Delete, CCV Mod, BPD Oil Cooler, SCT SF3

http://www.powerstroke.org/forum/gen...-endeavor.html


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post #8 of 22 Old 02-22-2012, 12:04 PM Thread Starter
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Definently loses pressure. When it drops it dont die just bogs down. Today it was good all day then out of nowhere it dropped and it wouldn't go above 60 at idle and around 50-55 driving.

2004 F250 CCSB King Ranch
4" MBRP Turbo Back Exhaust
Insight CTS with Fuel PSI and EGT Sensors
SCT with Gearhead Tunes and more to come
Gryphon FICM Programer
IPR Gen2 EGR Delete
ARP Headstuds with OEM Gaskets
Sinister Coolant Filter and ELC
Redhead Steering Box
285/75R16 Cooper Discover ST Maxx tires

And the wish list keeps getting bigger!!
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post #9 of 22 Old 02-22-2012, 01:49 PM
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Are you useing Ford or Racor fuel filters
2 stroker

06 F350 4x4 PSD Lariat FX4 CC LB
Edge Insight CTS Expandable Pyro
AutoMeter Fuel Pressure Gauge
Updated Fuel Reg. Kit 3C3Z-9T517-AG
Amsoil By-Pass(Amsoil 5w40)
Delo ELC Coolant
Coolant Filtration System
pulling a 14,000 lb Alpenlite 5er
97 F350 4x4 PSD CC LB
PacBrake&ATS converter lockup
3" dp 4" exhaust
TruCool 28,000 lb cooler
Tymar Intake
A piller EGT,Boost,Trans
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post #10 of 22 Old 02-22-2012, 02:13 PM Thread Starter
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Always ford filters! Changed around 4k miles ago. It just comes and goes... Kind of odd. I've seen a pump just totally quit. Not come and go like this. That's what makes me wonder if it's possible for the regulator to stick open once in a while.
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