1st Gen. Ram - All Topics Discussion for all Dodge Rams prior to 1994. This includes engine, drivetrain and non-drivetrain discussions. Anything prior to 1994 should go in here.

Fuel pressure gauge

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Old Sep 19, 2008 | 06:38 PM
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From: Kamloops B.C. Canada
Fuel pressure gauge

Hi, is a fuel pressue gauge just as necessary for VP and lift pump on the 1st generation as it is on the 98-02 generation?
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Old Sep 19, 2008 | 07:15 PM
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Yes! I burned up a brand new pump cause I misunderstood how much fuel pressure was needed. I was running a 7psi napa electric pump till just before her demise !!! I read somewhere you need a min. of 5psi at idle. So I had approx. 7psi at idle. What could be wrong with that? Oh, and had the pump turned up w/ POD's. I bet that pump cavitated as much as it pump fuel. I wondered for the longest time why I felt it drop off on the top end I get sooo tickled and aggrivated w/ myself over that one Oh well, ya live ya learn!
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Old Sep 20, 2008 | 06:30 AM
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On a stock truck, a fuel pressure gauge is not really necessary. The VE will pull its own fuel through a dead lift pump with no harm done as long as there's only 200 hp of fuel involved. I think any truck with big injectors needs a fuel pressure gauge, though.
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Old Sep 20, 2008 | 06:58 AM
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I'm sure your correct. I'm just overly paranoid since I'm on my 3rd. pump in 1.5 yrs. The first one, one that came on the truck died before I turned it up. Lift pump went bad and I didn't know it. I reckon there were some other factors involved like the switch to ULSD. I installed an oil pressure guage for less than $20 for a fuel pressure guage and have been satisfied. It at least letting me know my Holley blue is on its way out. With the sinsetivity of the VE I think a Fuel Pressure guage should have been installed from the factory .
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Old Sep 22, 2008 | 06:21 PM
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From: Kamloops B.C. Canada
Ya, this truck is bone stock.....I just thought a gauge could help find a problem before the problem got REALLY expensive. What is the bennefits of having that gauge?
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Old Sep 22, 2008 | 06:44 PM
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It will tell ya if your lift pump is bad before you burn up the IP. But as Wanna said, "On a stock truck a fuel pressure gauge is not really necessary" If ya want one and don't want to spend much, an oil pressure gauge works quite well. <$20 at Auto Zone
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Old Sep 22, 2008 | 07:42 PM
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Originally Posted by leeboy
What is the bennefits of having that gauge?

A fuel-pressure gauge between the fuel-filter and injection-pump is a very handy diagnostic tool; I watch my fuel-pressure closer than any other of the many gauges I have.

Once you learn what pressure is "normal" for your set-up, you can usually catch most fuel-feed issues before they shut things down.

Even better is to have two gauges, one ahead and one after the filter; with two, if the post-filter gauge starts losing pressure and the pre-filter gauge shows fine, then you know for certain that the problem lies within the filter.


Many is the fuel-filter that has been replaced when it was not at fault, simply because it is the first suspect in the chain of crime.
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Old Sep 22, 2008 | 10:10 PM
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From: okc,ok
ok so how do you and where do you tap in to the line genos has a bango bolt but i dont know if itll fit, cause im lookin at one too
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Old Sep 23, 2008 | 07:46 AM
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I am running 3/8" rubber fuel lines so I just purchased a T with the proper threads on the Up part of the T. I hope that makes sense.
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Old Sep 23, 2008 | 08:12 AM
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Originally Posted by randyswelding
ok so how do you and where do you tap in to the line genos has a bango bolt but i dont know if itll fit, cause im lookin at one too

This is the one that FITS the 1st Gen. engine, regargless of what it says :

http://www.genosgarage.com/prodinfo....BF-LONG-TAPPED


It is the one you will use if you are not replacing the rigid metal lines with a "Big Line Kit".

Some of my trucks use the tapped banjo-bolt, others have 3/8 rubber lines and use some manner of TEE-fitting for the fuel-pressure sender.


Either way, install a pressure "snubber" from McMaster-CARR to smooth out the surges, so that the gauge-needle stays steady and doesn't constantly flinch.
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