Permanent Fuel Rail Pressure Gauge
- Comanche91
- Donator
- Posts: 156
- Joined: February 13th, 2008, 4:51 pm
- Stroker Displacement: 4.6L
- Vehicle Year: 1991
- Vehicle Make: JeeP
- Vehicle Model: Comanche
- Location: Sweet Home Alabama
Permanent Fuel Rail Pressure Gauge
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:
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.
My ever-present red-eyed helper:
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:
Start 'er up and check for leaks. Hmmm, I'm about two PSI low:
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:
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.
My ever-present red-eyed helper:
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:
Start 'er up and check for leaks. Hmmm, I'm about two PSI low:
91 Comanche LWB, AW4, Hesco 4.6L, D44 Trac-lok, CHROME freak, ROLL TIDE
- John
- I love JeepStrokers.com!!
- Posts: 709
- Joined: February 13th, 2008, 8:35 pm
- Stroker Displacement: 4.6
- Location: West Virginia
Re: Permanent Fuel Rail Pressure Gauge
Beautiful helper. Mine is a Carin Terrier.
John
John
- Comanche91
- Donator
- Posts: 156
- Joined: February 13th, 2008, 4:51 pm
- Stroker Displacement: 4.6L
- Vehicle Year: 1991
- Vehicle Make: JeeP
- Vehicle Model: Comanche
- Location: Sweet Home Alabama
Re: Permanent Fuel Rail Pressure Gauge
My neighbor has a Cairn terrier John. She and my Gus are real good buddies.
91 Comanche LWB, AW4, Hesco 4.6L, D44 Trac-lok, CHROME freak, ROLL TIDE
- oletshot
- Donator
- Posts: 221
- Joined: February 14th, 2008, 11:47 am
- Location: Chicagoland
Re: Permanent Fuel Rail Pressure Gauge
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.
This brings this thread dangerously close to being in the wrong sub forum and getting moved.
Since you showed your helper, I thought I'd show mine. I screw up enough I need 3.
This brings this thread dangerously close to being in the wrong sub forum and getting moved.
I'm not clever enough to have a clever signature. I'll just steal yours.
'98 XJ 2-door, '94 YJ.
'98 XJ 2-door, '94 YJ.
- Comanche91
- Donator
- Posts: 156
- Joined: February 13th, 2008, 4:51 pm
- Stroker Displacement: 4.6L
- Vehicle Year: 1991
- Vehicle Make: JeeP
- Vehicle Model: Comanche
- Location: Sweet Home Alabama
Re: Permanent Fuel Rail Pressure Gauge
Different fittings, different gauge, but Peter's idea. Hey - I gave the Peter-man credit!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.
This brings this thread dangerously close to being in the wrong sub forum and getting moved.
Beautiful Labs oletshot. They look so close. Did you just cut and paste two from the first and color their collars differently?
91 Comanche LWB, AW4, Hesco 4.6L, D44 Trac-lok, CHROME freak, ROLL TIDE
- oletshot
- Donator
- Posts: 221
- Joined: February 14th, 2008, 11:47 am
- Location: Chicagoland
Re: Permanent Fuel Rail Pressure Gauge
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.Different fittings, different gauge, but Peter's idea. Hey - I gave the Peter-man credit!
Thanks about the labs. They are 3 brothers. Guess who didn't sell all their puppies.
I'm not clever enough to have a clever signature. I'll just steal yours.
'98 XJ 2-door, '94 YJ.
'98 XJ 2-door, '94 YJ.
-
- Where's the "any" key?
- Posts: 26
- Joined: December 3rd, 2008, 7:02 am
- Location: CA/NO
Re: Permanent Fuel Rail Pressure Gauge
Would it be a dumb idea to just have a gauge permanently mounted to the Schrader valve?
'86 XJ - 150/AX5/207 - RIP
'91 XJ - 242/AW4/242 - RIP
'88 XJ - 242/BA10/231
'93 ZJ - 318/46RH/242
'91 XJ - 242/AW4/242 - RIP
'88 XJ - 242/BA10/231
'93 ZJ - 318/46RH/242
- oletshot
- Donator
- Posts: 221
- Joined: February 14th, 2008, 11:47 am
- Location: Chicagoland
Re: Permanent Fuel Rail Pressure Gauge
It becomes a very bad idea when the gauge leaks or gets knocked off. Other than that, I see no problems with it.
I'm not clever enough to have a clever signature. I'll just steal yours.
'98 XJ 2-door, '94 YJ.
'98 XJ 2-door, '94 YJ.
- Muad'Dib
- Site Admin / Owner
- Posts: 1497
- Joined: January 8th, 2008, 10:55 am
- Stroker Displacement: 4.7L
- Vehicle Year: 1990
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Bend, Oregon
- Contact:
Re: Permanent Fuel Rail Pressure Gauge
Not just for Strokers, so i moved it.
If it feels right, then STROKE it!
You're lucky that hundred shot of CAPS LOCK didn't blow the welds on the forum!!
- Shark
- Consistent
- Posts: 268
- Joined: February 14th, 2008, 8:51 pm
- Location: Tampa Bay
Re: Permanent Fuel Rail Pressure Gauge
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
'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
- Shark
- Consistent
- Posts: 268
- Joined: February 14th, 2008, 8:51 pm
- Location: Tampa Bay
Re: Permanent Fuel Rail Pressure Gauge
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
'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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