Got my guage installed to day and I hooked it into the banjo bolt at the top of the fuel filter. I have 6psi... 6 at idle... 6 at 60 mph.... 6 at WOT.

WTF!!!!

Any ideas? I know it is a tad low but you would think it would move a LITTLE!!!

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my bad.... this is on the 12valve..... um is the gauge electric or mechanical?

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Mechanical...

That little lift pump doesn't put out much PSI. That sounds about right to me.

I may be wrong on this as I'm no VE expert... but I believe the IP has a return line for excess fuel. In other words what your IP doesn't use of that 6psi at idle just gets recycled, and the more fuel the IP uses (WOT), the less it recycles. Don't quote me on that... Hopefully some one else who knows more about the fuel system will give us a heads up.

Chris

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DR.org says the fuel pressure should be:

91 Ram engine specs

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Before or after the injection pump?

Bobby did you fill the line up with fuel before you connected it to the gauge ?

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should be before

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I don't know where they're measuring that on Genos, but thats way way to high for where your gauge is Bobby. Pressures like that will blow the front seal out. Factory service manual says 3-5, and that should be across the rpm range with everything stock. Right now your truck isn't using enough fuel for the stock lift pump and return line can't keep it regulated.

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Yep... hooked everything up... Started the truck and the cracked the line at the gauge to bleed all th eair out.

Your pressures are right in line. It tells me the lift pump is healthy, and supplying the injector pump what it needs for its curent demands. The book says the minimum is 3psi at WOT. Mine will go down to 0 with stock injectors and some pump tuning. The max for a stock-internal VE (no clips to hold the front seal or anything of that sort) is about 18-20psi. After that, you start "making oil." If you find your fuel pressure dipping on hard runs, you can upgrade to a low pressure piston lift pump- Cummins # 3936320

Johnny Cetane- those sound like maybe 2ndGen 12v pressures, though I didnt know they got up in the 30s. I know the P7100 can handle more input pressure than a VE.

Daniel