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Fuel Pressure Issue

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My truck is a 2001.  I have an older AirDog, and an ISSPRO electric fuel gauge.  The issue I'm having is that when I first bump the ignition I get about 15-16psi of fuel pressure.  Then running, or even if you let the pump shut off and then rebump the ignition, the fuel pressure goes up to 26psi.  I really need to get my test gauge on it, but two different sending units and gauges have been put on it, and both read the same.  I was wondering if anyone has any ideas of what I should check?  Is it the AirDog, that's marked as being regulated at 15 psi, did I screw up with how I installed the gauge?  Any input would be greatly appreciated. 

Also, the AirDog was on before I pressure gauge was (I know shame on me....), so I do not know if this is a recent change or has always done it.

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  • Mopar1973Man
    Mopar1973Man

    Best off going direct plumbed to the gauge. Very few people have gotten an isolator to work right and accurately. 

  • dripley
    dripley

    I got the big line kit from Vulcan and ordered a tapped tee along with it. It is installed about half way between the filter canister and the VP. I did not use a snubber, i have the valve barely crack

  • 015point9
    015point9

    As far as getting everything you need to install... I questioned that also.  I e-mailed a pic to Vulcan and he sent me everything what I needed. Great service.  He also told me about (and I bough

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:think: Hmmm..... That looks like a tire valve stem remover.  Hopefully the intention of this contraption was not to use the removers little hole as a "snubber" as its crammed in the fitting.  That would be podunk for sure.  Giving them the benefit of doubt, maybe you need to call Vulcan and ask them.

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48 minutes ago, KATOOM said:

:think: Hmmm..... That looks like a tire valve stem remover.  Hopefully the intention of this contraption was not to use the removers little hole as a "snubber" as its crammed in the fitting.  That would be podunk for sure.  Giving them the benefit of doubt, maybe you need to call Vulcan and ask them.

Valve stem remover is exactly what I thought.  Just got a reply from Vulcan.  Here's what they said: The kits are universal for all years, the silver piece is a 4/2 pipe adapter for those that may need it such as attaching an electric sender to the end of the hose and the other is a core too for 2000-2002.

 


 

If i did mine over again I would move it closer to the filter just to help keep the line more out of the way. I never broken mine working around it but it does tend to get in the way sometimes.

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