3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

What fuel pressure numbers should I expect?

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Old 05-14-2008, 02:01 PM
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What fuel pressure numbers should I expect?

I just got my FP gauge installed yesterday and it is working great. I am running the 5 micron Baldwin in my Stock canister and 2 micron GDP Big Line kit set up.

Idle= 11 Psi

Cruising 65-70 down the hwy= 10 psi

Coming up to a stop sign= 12psi

Get on it to Pass someone= 9 Psi


What should I expect when i tow my large horse trailer? Are these numbers about average for my set up? Thanks!
Old 05-14-2008, 02:36 PM
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For a stock lift pump, those look right. For a GDP Walbro, add about 8 psi to those numbers.

--Eric
Old 05-14-2008, 04:41 PM
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Stock fuel pressure at idle seems to be around 8-9. I think hammering it I can get it down to 3.
Old 05-14-2008, 05:53 PM
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Cool ! I guess I'm right in the ball park then!
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