Fuel Pump PSI

bob32racing · #1 11-23-2007, 04:27 PM

Idle psi?
55-60 psi?
what are they? -

Uncle Bubba · #2 11-23-2007, 04:34 PM

If your in a VP-44 equipped truck and ildling at these pressures, run she's gonna blow. What is it your wantin to know. -

Wyatt Earp · #3 11-23-2007, 04:35 PM

By fuel pump you mean Injection Pump and for a second generation truck it is:
15 to 18 PSI at idle.
no less than 13 under load and no less than 11 at WOT.

If you see anything less than that you need a new lift pump (transfer pump) or to at the very least change your filters. If you have many days of low pressure you will effect the health of your IP.

There are many options on this fix and many other items related to it. -

bob32racing · #4 11-25-2007, 11:40 AM

Ok i have vp 44 but i get around 13 to 14 at idle new filter 2 weeks ago lift pump a year ago. I have an edge and if its turned up all the way and i get in it it will drop to 3-4. just wondering what the pressures were supposed to be -

lukesdiesel · #5 11-25-2007, 11:59 AM

Sounds like its time for a FASS -

Whit · #6 11-25-2007, 01:17 PM

Originally Posted by bob32racing

Ok i have vp 44 but i get around 13 to 14 at idle new filter 2 weeks ago lift pump a year ago. I have an edge and if its turned up all the way and i get in it it will drop to 3-4. just wondering what the pressures were supposed to be

3-4 psi at Wot aint good man.......you need to upgrade yer fuel delivery -

Uncle Bubba · #7 11-25-2007, 05:56 PM

A better lift pump, larger fuel lines, a better pickup system in the tank and replacing or modifying the banjo bolts are all way to improve the fuel flow and psi numbers.

Be sure to fill out your signature so we can see what you have, this helps answer questions better. -

**00' Quad Cab** · #8 11-25-2007, 10:52 PM

There are several aftermarket lift pump kits that can help you with the low fuel pressure problem.

FASS is one way, Walbro 392 kit (the way I went) is another, upgrading fuel lines is another, just going to 1/2" fuel line from Vulcan helped my stock pressures out a bit.

Do some reading and find the kit that makes the most sense to you. -

Uncle Bubba · #9 11-25-2007, 11:03 PM

I have just installed a belt drive lift pump that so far I am completely impressed with also. -

mysterync · #10 11-25-2007, 11:11 PM

Oh Cmon guys, What he really needs is a New Helix 2 Cam and a Manual pump setup!!!!

Just Kidding! These guys wont lead you wrong! -

Mopar1973Man · #11 12-01-2007, 09:24 AM

Originally Posted by bob32racing

Idle psi?
55-60 psi?
what are they?

Here is the specs from Dodge FSM for the VP44 trucks...

I've stayed at this rule and never had a VP44 problem or failure...

-

Fishin2Deep4U · #12 12-07-2007, 05:38 PM

Originally Posted by mysterync

Oh Cmon guys, What he really needs is a New Helix 2 Cam and a Manual pump setup!!!!

Just Kidding! These guys wont lead you wrong!

This is what I am running.

45 psi at idle, 43 at cruise, 37 at WOT.

I have a Draw Straw, -8 lines on the suction side and -6 on the pressure side running through the factory filter housing. Yes, I still have heated fuel if needed.

Dave -

Whit · #13 12-07-2007, 05:44 PM

WOW Dave..thats way too much pressure

I am suprised it runs at all

yer VP internal spillack is in full tilt

what the heck ya runnin fer a pump??? -

Fishin2Deep4U · #14 12-07-2007, 05:47 PM

Originally Posted by Whitmore

WOW Dave..thats way too much pressure

I am suprised it runs at all

yer VP internal spillack is in full tilt

what the heck ya runnin fer a pump???

12 Valve lift pump. I am working on a custom bypass, post filter. That should limit presure to 25 or so psi.

I have over 60K on the current setup.

And don't forget, too much is almost enough!!

Dave -

**DangerousDuramax** · #15 12-07-2007, 05:51 PM

Originally Posted by Uncle Bubba

I have just installed a belt drive lift pump that so far I am completely impressed with also.

Did you get a MITUSA? -

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