Fuel Pressure - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 5 (permalink) Old 03-30-2008, 04:41 PM Thread Starter
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Fuel Pressure

Hey guys, quick question. 16.5psi at idle, and around 12 at WOT, thats whare its supposed to be, right? Last night i put on my fuel pressure guage, big line kit, and holly black pump, and that is the pressure Im getting. The truck feels very strong after bypassing the stock lift pump, which I think was failing anyway!



3 showers later and I still smell like diesel....must be what pulls all the chickiees.

My truck wants to be a semi when it grows up...
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post #2 of 5 (permalink) Old 03-30-2008, 08:15 PM
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Quote:
Originally Posted by JeffyBuilt
Hey guys, quick question. 16.5psi at idle, and around 12 at WOT, thats whare its supposed to be, right? Last night i put on my fuel pressure guage, big line kit, and holly black pump, and that is the pressure Im getting. The truck feels very strong after bypassing the stock lift pump, which I think was failing anyway!



3 showers later and I still smell like diesel....must be what pulls all the chickiees.
yea well you know what they say about diesel cologne: "70 percent of the time, it works every time"

Eric

1994 Dodge Ram 2500

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post #3 of 5 (permalink) Old 03-31-2008, 03:48 AM
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Here is the fuel specs for your truck...
http://mopar.mopar1973man.com/2002%2...ift%20pump.htm

MINIMUM of 10 PSI REQUIRED!

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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post #4 of 5 (permalink) Old 03-31-2008, 01:11 PM
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Quote:
Originally Posted by JeffyBuilt
3 showers later and I still smell like diesel....must be what pulls all the chickiees.
:hehe You know that. Seriously though 7psi is the minimum from what i have read that you want the VP44 to see. If it drops below 10psi i would be getting another pump. I hope you have good luck with the holley pumps. Cause i am on my second one and it is acting up too.

Josh
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1991 Ford Ranger 2.3 Turbo charged with a Holset HY35
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post #5 of 5 (permalink) Old 03-31-2008, 02:45 PM
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Quote:
Originally Posted by 91rangerturbo
:hehe You know that. Seriously though 7psi is the minimum from what i have read that you want the VP44 to see. If it drops below 10psi i would be getting another pump. I hope you have good luck with the holley pumps. Cause i am on my second one and it is acting up too.
I lost my first VP44 at 50K miles with 8-9 PSI of fuel pressure... :

Also if you do the fuel pump diagnostics you'll fill the flow rate below 10 PSI is a failing... It doesn't pump enough fuel at WOT to cool and lubricate the vP44.

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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