Permanent Fuel Rail Pressure Gauge

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Comanche91
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Permanent Fuel Rail Pressure Gauge

Post by Comanche91 »

Here's a simple little mod I modified from TallPeter's post on the Yahoo Stroker group pages. This saves you time by enabling you to check your fuel pressure any time you want. The parts:
1.) A 0-60 PSI liquid-filled 1-1/2" fuel pressure gauge from Jegs, p/n 555-41012
2.) A brass 1/4" flare x 1/8" female NPT straight adapter fitting

Use teflon tape on the gauge pipe threads then snug it on the adapter:
Image

After the engine has been sitting overnight and is cold, let any fuel rail pressure off first by depressing the needle. Have a rag handy in case the fuel squirts out. Then remove the core needle from the fuel rail Schrader valve w. an extractor tool, same tool used for bicycle tires.
Image

My ever-present red-eyed helper:
Image

Screw the assembled gauge and adapter on the Schrader valve. Since it's a flare, do not use teflon tape, and do not over-tighten:
Image

Start 'er up and check for leaks. Hmmm, I'm about two PSI low:
Image
91 Comanche LWB, AW4, Hesco 4.6L, D44 Trac-lok, CHROME freak, ROLL TIDE
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John
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Re: Permanent Fuel Rail Pressure Gauge

Post by John »

Beautiful helper. Mine is a Carin Terrier.
John
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Comanche91
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Re: Permanent Fuel Rail Pressure Gauge

Post by Comanche91 »

My neighbor has a Cairn terrier John. She and my Gus are real good buddies. :D
91 Comanche LWB, AW4, Hesco 4.6L, D44 Trac-lok, CHROME freak, ROLL TIDE
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oletshot
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Re: Permanent Fuel Rail Pressure Gauge

Post by oletshot »

How does that differ from Peter's? I'm pretty sure it was his that I saw in a pic. about a year ago. Seems about the same as what I remember his to be.
Since you showed your helper, I thought I'd show mine. I screw up enough I need 3. :lol:
Image

This brings this thread dangerously close to being in the wrong sub forum and getting moved. :nono:
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Comanche91
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Re: Permanent Fuel Rail Pressure Gauge

Post by Comanche91 »

oletshot wrote:How does that differ from Peter's? I'm pretty sure it was his that I saw in a pic. about a year ago. Seems about the same as what I remember his to be.
Since you showed your helper, I thought I'd show mine. I screw up enough I need 3. :lol:
Image

This brings this thread dangerously close to being in the wrong sub forum and getting moved. :nono:
Different fittings, different gauge, but Peter's idea. Hey - I gave the Peter-man credit! :D

Beautiful Labs oletshot. They look so close. Did you just cut and paste two from the first and color their collars differently? :D
91 Comanche LWB, AW4, Hesco 4.6L, D44 Trac-lok, CHROME freak, ROLL TIDE
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Re: Permanent Fuel Rail Pressure Gauge

Post by oletshot »

Different fittings, different gauge, but Peter's idea. Hey - I gave the Peter-man credit!
You did. I didn't notice the difference, and am to lazy to look it up. I felt it easier to ask you what you what was different.

Thanks about the labs. They are 3 brothers. Guess who didn't sell all their puppies. :brickwall:
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ARH
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Re: Permanent Fuel Rail Pressure Gauge

Post by ARH »

Would it be a dumb idea to just have a gauge permanently mounted to the Schrader valve?
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oletshot
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Re: Permanent Fuel Rail Pressure Gauge

Post by oletshot »

It becomes a very bad idea when the gauge leaks or gets knocked off. Other than that, I see no problems with it.
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Re: Permanent Fuel Rail Pressure Gauge

Post by Muad'Dib »

Not just for Strokers, so i moved it.
If it feels right, then STROKE it!
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Re: Permanent Fuel Rail Pressure Gauge

Post by Shark »

Sorry to drag up an old post, but i cant seem to find "A brass 1/4" flare x 1/8" female NPT straight adapter fitting" on summitracing or jegs or anywhere else for that matter. Can someone point me in the right direction?
'91 MJ 4.0 ax15 Resto-mod street truck project, stroker candidate
'93 XJ 2door 4.0 aw4 np231 7" lift 33's
'95 XJ 4door 4.0 aw4 2" 31's
'95 XJ 4door 4.0 aw4 np231 4" lift 31's RIP
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Shark
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Re: Permanent Fuel Rail Pressure Gauge

Post by Shark »

In case anyone needs this in the future, Comanche91 emailed me back about the fitting. It can be found here http://www.casperselectronics.com/store ... ts_id=1337
'91 MJ 4.0 ax15 Resto-mod street truck project, stroker candidate
'93 XJ 2door 4.0 aw4 np231 7" lift 33's
'95 XJ 4door 4.0 aw4 2" 31's
'95 XJ 4door 4.0 aw4 np231 4" lift 31's RIP
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