Fuel Pressure Issue

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Mar 24, 2010 | 05:14 PM

#16

DemonRace6

Thread Starter

Hi!

Joined: Sep 2007

Posts: 1,268

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From: Central NJ

Quote:

Originally Posted by aklim

If I were do do an amp draw, I'd start from the pump back. Bad fuel pump means you change it. Since it is outside, at least in a diesel, it might not be an issue

100 Amp 6 Volt/12 Volt Battery Load Tester
- Harbor Freight Tools - Quality Tools at the Lowest Prices

Would this work?

Mar 24, 2010 | 05:19 PM

#17

DemonRace6

Thread Starter

Hi!

Joined: Sep 2007

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From: Central NJ

Quote:

Originally Posted by Izzy351

You can plumb a gauge into the bowl temporarily and run it to where you can see it while driving. Just revving it doesn't put it under load (unless you're on a dyno). You need to drive it. BTW, I may have missed it, but what's it dropping to?

So I just need a gauge before the bowl, no regulator?

WOT from 0 to 60
Regulator set to 60psi:
My diesel w/ Walbro pump drops to 0 psi
My grease w/ FASS HPFP pump drops to about 25 psi

Regulator set to 80psi:
My diesel w/ Walbro pump drops to 5-10 psi
My grease w/ FASS HPFP pump drops to about 35-40 psi

Mar 24, 2010 | 05:23 PM

#18

DemonRace6

Thread Starter

Hi!

Joined: Sep 2007

Posts: 1,268

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From: Central NJ

I originally though it was a problem with my regulator and tested by clamping my return line to see if the pressure went up, and it did, but I sent the regulator back to Automotive and they replaced parts of it but when reinstalled I still have the same problem.

Here is a video of the test:
YouTube - 10-02-21 Regulator Problem 008.AVI

Mar 25, 2010 | 07:19 AM

#19

Izzy351

Post Fiend

Joined: Feb 2007

Posts: 14,541

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From: Dallas-Ft. Worth

Quote:

Originally Posted by DemonRace6

Be careful -- you're starving the injectors big time!

There are two ports on the bowl -- one is after the filter (bottom passenger side where the lines go to the heads -- that's where I have mine plumbed in right now). The other is upper driver side, which is before the filter. That one will tell you if your pump is working or restricted somehow. If there's a restriction in the bowl, you'll know it right away. Leave the regulator set to where you normally run it. Mine is set to 60-65psi.

Mar 30, 2010 | 10:16 AM

#20

DemonRace6

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Hi!

Joined: Sep 2007

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From: Central NJ

Quote:

Originally Posted by Izzy351

I just found this thread: https://www.ford-trucks.com/forums/9...wl-delete.html

I think I might do this as I have wanted to delete the fuel bowl for a while now anyway.

With this done I will know if it is my fuel pump for sure or not. and I don't have to buy a gauge

Mar 30, 2010 | 11:01 AM

#21

aklim

Lead Driver

Joined: Jan 2006

Posts: 7,308

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From: Hartford, WI

Quote:

Originally Posted by DemonRace6

I think I might do this as I have wanted to delete the fuel bowl for a while now anyway.

With this done I will know if it is my fuel pump for sure or not. and I don't have to buy a gauge

Other than having more Real Estate there, is there a reason? Just curious. I live in an area with Winter so having the fuel bowl will be nice. Also, IIRC, until you get to 600HP or is it 500HP, the fuel bowl isn't a restriction.

How will you know for sure without a gauge? How will you set the fuel pressure WITHOUT a gauge?

Mar 30, 2010 | 11:28 AM

#22

DemonRace6

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Hi!

Joined: Sep 2007

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From: Central NJ

Quote:

Originally Posted by aklim

I want to remove it because I run the veg oil and going through this additional filter is expensive. Also I think the bowl might be the problem because I cleaned it and then this problem started. (but i had this problem with the extremely dirty bowl too)

I have the automotive regulator which sets my pressure, just no gauge before the fuel bowl