Fuel pressure gauge - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 99 (permalink) Old 10-27-2014, 03:34 AM Thread Starter
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Fuel pressure gauge

Possible dumb question.

I've been concerned about my fuel pressure ever since I contaminated my fuel with some white label power service fuel additive that I was storing in a plastic container that it "ate". I plugged a filter when it happened and was seeing some erratic needle movement so I changed filters again 2 weeks ago. It had more plastic residue on the rail filter but the filter on the engine was normal in appearance. My fuel pressure gauge is under the hood since it's an analog gauge and I didn't buy the kit to allow placement in cab. I started it up this morning and notice it vibrates between 50 and 60 just like 2 weeks ago. After I changed filters a couple of weeks ago it pretty much stayed at 60 like normal. I had my tallest helper push the accelerator and under some load it stabilized at 60. Didn't have time today to disconnect and put it so I could see thru the windshield while driving. I'm gonna try that next week and probably pull the filter again. Any one else see a needle flutter at idle or any thoughts on this?

This bone head move continues to haunt me.

Early 2004 F-250 4x4 CC 6.0


2nd owner, ARP studs 1 at a time, Some parts missing in the exhaust path, BD intercooler hoses, Blue spring, MC filters, Sinister coolant filter, Exhaust manifold gaskets, WARN lockouts, Gold coolant, zoodad mod, autometer boost gauge, high idle mod, Scangauge 2, SCT X3 tuned from KEM, autometer fuel pressure gauge, Archoil 6200 in the fuel, FICM by Ed w/ATLAS40, autometer pyro gauge,'08 Alum Rear Diff cover, 5w-40 Rotella T6 w/ Archoil 9100 in it, zert in the slip joint, harpooned fuel tank, 6.4 banjos


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post #2 of 99 (permalink) Old 10-27-2014, 04:59 AM
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Don't beat yourself up Weld, were here for you.

I have a sender/stepper motor gauge setup on mine, needle on my gauge is always rock steady or slow moving downword a few psi when accelerating hard.

Mine reads 72psi average, and cold mornings it will be 75-77psi which makes my 75psi red alarm light in the gauge light up, I have the alarm set for 45 psi low and 75psi high.

Worse case scenario sounds like the HFCM fuel pump may be weak if the fuel filter didn't fix it, or maybe the HFCM inlet line going to the fuel tank is clogged?

Your truck dosen't have a steel fuel tank by any chance does it?

Some trucks with steel fuel tanks had inner tank liner delamination issues that would cause similar symptoms like yours.

Harry

Jan 03' built 6.0/F250cc4wd trqsft/SCT-tuned by KEM-Performance/Garrett Powermax vg-turbo/blue spring mod/gauges=egt+boost+fuel+SG2/exhaust/airaid intake/DR 4.5 lift/dual bilsteins/315's/greasable ball joints/powerstop/smittybuilt/kc lights/high idle mod/roll-n-lock/Mobil Delvac1 ESP 5W40 with (Archoil AR9100 in the oil) and (AR6200 in the fuel)
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post #3 of 99 (permalink) Old 10-27-2014, 11:29 AM
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Mine will tick a pound or 2 but I just attribute it to a sticky relief valve in the regulator and stays around 60 psi.

2003 F-250 CC SB FX4 Lariat Black on Gold
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post #4 of 99 (permalink) Old 10-27-2014, 11:49 AM Thread Starter
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Quote:
Originally Posted by harry6.0 View Post
Don't beat yourself up Weld, were here for you.

I have a sender/stepper motor gauge setup on mine, needle on my gauge is always rock steady or slow moving downword a few psi when accelerating hard.

Mine reads 72psi average, and cold mornings it will be 75-77psi which makes my 75psi red alarm light in the gauge light up, I have the alarm set for 45 psi low and 75psi high.

Worse case scenario sounds like the HFCM fuel pump may be weak if the fuel filter didn't fix it, or maybe the HFCM inlet line going to the fuel tank is clogged?

Your truck dosen't have a steel fuel tank by any chance does it?

Some trucks with steel fuel tanks had inner tank liner delamination issues that would cause similar symptoms like yours.

Harry
I'll check the tank I can't say for sure. The pick up tube suggestion was a thought too. I'm gonna pull the filter again and start looking at a replacement fuel pump and possibly pulling the fuel tank. Last thing I want to do is starting killing injectors with low fuel pressure.

Thanks for the moral support Harry!

Early 2004 F-250 4x4 CC 6.0


2nd owner, ARP studs 1 at a time, Some parts missing in the exhaust path, BD intercooler hoses, Blue spring, MC filters, Sinister coolant filter, Exhaust manifold gaskets, WARN lockouts, Gold coolant, zoodad mod, autometer boost gauge, high idle mod, Scangauge 2, SCT X3 tuned from KEM, autometer fuel pressure gauge, Archoil 6200 in the fuel, FICM by Ed w/ATLAS40, autometer pyro gauge,'08 Alum Rear Diff cover, 5w-40 Rotella T6 w/ Archoil 9100 in it, zert in the slip joint, harpooned fuel tank, 6.4 banjos


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post #5 of 99 (permalink) Old 10-27-2014, 02:01 PM
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Heres an image of fuel tank pickup tube and screen clogging from contaminates like delamination...
http://www.thedieselstop.com/forums/...-1-medium-.jpg

Harry

Jan 03' built 6.0/F250cc4wd trqsft/SCT-tuned by KEM-Performance/Garrett Powermax vg-turbo/blue spring mod/gauges=egt+boost+fuel+SG2/exhaust/airaid intake/DR 4.5 lift/dual bilsteins/315's/greasable ball joints/powerstop/smittybuilt/kc lights/high idle mod/roll-n-lock/Mobil Delvac1 ESP 5W40 with (Archoil AR9100 in the oil) and (AR6200 in the fuel)
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post #6 of 99 (permalink) Old 10-27-2014, 02:10 PM
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Quote:
Originally Posted by jsm180 View Post
Mine will tick a pound or 2 but I just attribute it to a sticky relief valve in the regulator and stays around 60 psi.
Does your regulator have the blue spring upgrade?

I've always wondered why mine reads so high after installing the complete Ford oem blue spring upgrade kit that uses a new cover and internals. Another guy I know with an 03' say's his reads like mine too with the Ford kit.

45-75psi is the spec, 45 being bare minimum and 75 being max. But mines been like this for years now with no issues yet. Just concerns me a little during cold weather season and the fuel starts to thicken, the pressure is a bit on the high side until the fuel warms up and thins back down.

Harry

Jan 03' built 6.0/F250cc4wd trqsft/SCT-tuned by KEM-Performance/Garrett Powermax vg-turbo/blue spring mod/gauges=egt+boost+fuel+SG2/exhaust/airaid intake/DR 4.5 lift/dual bilsteins/315's/greasable ball joints/powerstop/smittybuilt/kc lights/high idle mod/roll-n-lock/Mobil Delvac1 ESP 5W40 with (Archoil AR9100 in the oil) and (AR6200 in the fuel)
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post #7 of 99 (permalink) Old 10-27-2014, 03:17 PM
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Quote:
Originally Posted by harry6.0 View Post
Does your regulator have the blue spring upgrade?

I've always wondered why mine reads so high after installing the complete Ford oem blue spring upgrade kit that uses a new cover and internals. Another guy I know with an 03' say's his reads like mine too with the Ford kit.

45-75psi is the spec, 45 being bare minimum and 75 being max. But mines been like this for years now with no issues yet. Just concerns me a little during cold weather season and the fuel starts to thicken, the pressure is a bit on the high side until the fuel warms up and thins back down.

Harry
Yes, it has the blue spring. Pressure was 50 psi with the stock spring.

Weld, when I harpooned my tank I found the pickup screen rotted off the the bottom and laying in the tank. Just something to look for if you drop the tank.

2003 F-250 CC SB FX4 Lariat Black on Gold
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post #8 of 99 (permalink) Old 10-27-2014, 06:00 PM Thread Starter
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I have a hunch my screen is plugged up.

Is the screen replaceable or will I need a hole new sending unit?

Looks like I better get the tank dropped soon.

I would typically see 60 psi just like jsm180 w/ blue spring. I never had a pressure gauge before I did the upgrade.

Early 2004 F-250 4x4 CC 6.0


2nd owner, ARP studs 1 at a time, Some parts missing in the exhaust path, BD intercooler hoses, Blue spring, MC filters, Sinister coolant filter, Exhaust manifold gaskets, WARN lockouts, Gold coolant, zoodad mod, autometer boost gauge, high idle mod, Scangauge 2, SCT X3 tuned from KEM, autometer fuel pressure gauge, Archoil 6200 in the fuel, FICM by Ed w/ATLAS40, autometer pyro gauge,'08 Alum Rear Diff cover, 5w-40 Rotella T6 w/ Archoil 9100 in it, zert in the slip joint, harpooned fuel tank, 6.4 banjos


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post #9 of 99 (permalink) Old 10-27-2014, 06:50 PM
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The screen is replaceable, just pushes on. My local dealer hit me for $70, I think Tousley had it for $40, I couldn"t wait.

2003 F-250 CC SB FX4 Lariat Black on Gold
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post #10 of 99 (permalink) Old 10-30-2014, 04:27 AM Thread Starter
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Quote:
Originally Posted by jsm180 View Post
The screen is replaceable, just pushes on. My local dealer hit me for $70, I think Tousley had it for $40, I couldn"t wait.
Found the screen on eBay for $34 with free shipping. I hope to pull it Saturday, my recent repair work on my knee has slowed me down a bit. Nothing like an ACL replacement to make things interesting right now. I'll take pics when I get it apart but I'm pretty sure it's plugged. It looks like there is a bypass on the side so if that's the case that may be causing the needle fluctuations at idle opening and closing? I'll put a magnet to it tomorrow night and see if tank is steel. Just been busy with work.

Any tips on dropping the fuel tank? It's a crew cab short box 4x4. Some fuel line connection tools look like a must have. Calling for snow flurries on Halloween.

Early 2004 F-250 4x4 CC 6.0


2nd owner, ARP studs 1 at a time, Some parts missing in the exhaust path, BD intercooler hoses, Blue spring, MC filters, Sinister coolant filter, Exhaust manifold gaskets, WARN lockouts, Gold coolant, zoodad mod, autometer boost gauge, high idle mod, Scangauge 2, SCT X3 tuned from KEM, autometer fuel pressure gauge, Archoil 6200 in the fuel, FICM by Ed w/ATLAS40, autometer pyro gauge,'08 Alum Rear Diff cover, 5w-40 Rotella T6 w/ Archoil 9100 in it, zert in the slip joint, harpooned fuel tank, 6.4 banjos


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