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Fuel Rail pressure Guage

This is a discussion on Fuel Rail pressure Guage within the General Help forums, part of the LSx Technical Help Section category; Hey All, I did a LS6 intake swap last year and I installed this fuel pressure Guage. It is liquid ...

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    Senior Member kingls1's Avatar
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    Fuel Rail pressure Guage

    Hey All, I did a LS6 intake swap last year and I installed this fuel pressure Guage. It is liquid filled and works perfect.
    However I received a call Sunday from a friend who seen my car at a show Saturday. He told me to get it off ASAP because they are known to leak and spray fuel and catch the car on fire. He said fuel eats away at the Guage until failure. He is a great mechanic and accomplished drag racer. So my question has anyone seen or heard of this before?
    And what is a good set of gauges if I choose to move it to the windshield piller along with oil and temp.

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    Spaz is My Mentor SMWS6TA's Avatar
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    What's the brand of the gauge?

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    My thoughts would be it's not worth the risk for a gauge you can only see with the hood up.....at that point you might as well just use the temporary gauge to check pressure. I have no idea if that particular gauge leaks but your friend seems to think so and that would be enough for me to not risk it if it was someone I trusted.
    Quote Originally Posted by Mean Green Z28 View Post
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    Senior Member kingls1's Avatar
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    Not sure of the brand pretty sure I got it from eBay. He told me that style of Guage should only be used for testing and then removed. I have seen others who used them but never heard of any problems. Thought it looked cool gives it a more hot rod feel in a other wise blah engine. I guess I could always reinstall the schrader valve in and reinstall Guage instead of cap. It never reads unless motor is running or key is on activating fuel pump.
    I would like to move them inside and add temp and oil some day.
    99 Trans Am, SLP Lid, Blackwing filter, smooth bellow, Ported TB, LS6 intake, Ws6 lower ram air box, OBX LT's, Magna Flow cat back, LS7 clutch, Tick MC, Hurst Shifter, Frost Tune, UMI SFC,LAC, STB, PB, Torq Arm, Super Hawk hood, Torq Thrust II, Kee Audio.
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    FWIW, I run an Autometer Sport Comp digital fuel pressure gauge on my A-pillar. I have not heard of anyone having issues with any of the underhood style gauges. I always liked the look of yours and thought that it made for an easy check of the fuel system.

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    Senior Member kingls1's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    What's the brand of the gauge?
    it is a Marshell Guage
    Private Label Fuel Pressure Gauge. OEM Fuel Pressure Gauge. Custom Fuel Gauge.
    CWB 0-100 PSI Liquid Filled Mechanical Gauges from Marshall Instruments
    It is made in USA with stainless steel case and Brass internal's and from everything I read are built to be directly attached to fuel line. I'm sending them a email to get their take but I feel a lot better. There is a lot of China junk out there maybe this is what he is seeing problems with.

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    Probably ok to continue to run it based on what you described.

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    Spaz is My Mentor SMWS6TA's Avatar
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    That's what I was thinking.
    Last edited by SMWS6TA; 05-27-2015 at 08:48 AM.

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    Senior Member kingls1's Avatar
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    Here is the response I received from my inquiry to Marshell
    Hi:

    Most people leave them on but you only need the gauge when tuning/checking
    your fuel system.

    Sincerely,
    Paul Bradley
    Marshall Instruments
    Not really the response I was looking for as it seems to cover both areas. Does the glove fit O.J. or not. I know I'm just going to get a fire extinguisher and put in car. Probably a good idea to have one in there anyhow.

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    Veteran 0rion's Avatar
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    I guess I just have a hard time figuring out the reasoning for having it. You can't see it unless the hood is up so it's showing a fuel pressure you can't see 99% of the time. If you want it for car shows then put it on before you go to the show then you can pop the hood and read the zero psi while the hood is up at the show.

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    Personally, I vote getting a pillar pod and installing one inside the car where you can see it all the time. It's nice to monitor constantly and in the event something should ever happen, you'll notice it immediately and you can pull over and shut the car off.

    The fuel pressure gauge I went with was the Auto Meter 6563 - Auto Meter Ultra-Lite Digital Series Gauges. Been installed 4 years now and works flawlessly.
    It's on jackstands.

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    What do you use on the threads when installing a fuel pressure gauge like yours?


    Sent from my iPad using Tapatalk

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    Senior Member kingls1's Avatar
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    Loctite 567 will work

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    Spaz is My Mentor SMWS6TA's Avatar
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    I used yellow Teflon tape. It's for oil, gas, etc. $5 from Home Depot. Paste is better though

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    Pretty sure I used a blue paste type thread sealant on the connection for the sender on our car.

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    Quote Originally Posted by kingls1 View Post
    Loctite 567 will work
    +1 I used to install industrial instrumentation for a living and the Locktite pipe dope was the best we could find.

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