Not the typical Fuel Issues - Ford Powerstroke Diesel Forum
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post #1 of 1 Old 08-09-2012, 06:37 PM Thread Starter
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Not the typical Fuel Issues

So I thought id give the old girl a little treat.

New fuel pump.

The company that builds it will remain un named until I have this issue sorted out.
But for reference purposes it is a factory replacement flows 150gph should do 50psi factory setting and up to 70 with the adjustable regulator thats built into the unit.

Here is my Issue.

The pump will only make 40psi.

It is not sucking air anywhere. Nor is it leaking fuel.

With my RR setup I had been running the Ford factory pump at 65psi.

Yes I have adjusted the RR system no less than 1000 times. It will only return fuel to the tank. When the RR is set under 40psi.

Yes I have adjusted the regulator on the new fuel pump itself.

By the way was bottomed (Full Pressure) when i got it. And the O rings their tech told me to check on the regulator were shot. Lucky for me the pump comes with replacement o rings. Just didnt think id need to do them before the truck left my shop!!!

Light Driving and idle it stays at 40psi. WOT it drops to 30. checked with 2 different gauges.

The power supply to the pump is perfect. The ground Is perfect.

I really cant afford this down time right now. Need the truck to Move!! 40PSI scares me. However it 1/2 supply and 3/8 lines to the heads. Might be enough volume?

So im looking for some fresh ideas because im all out. Maybe some of the RR return guys that run after market lift pumps have had issues?

But im thinking the pump is no good.

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2003 F350 DRW 7.3 6 speed. 4 inch lift, 35x12.50's Goodyear Dura Trac all around, steel 2 inch dually spacer rear. southbend clutch, Dp tuner high idle 60t 80 econ 120 race 140 extreme, afe stage2 intake, pdr super gtp turbo, pdr up pipes, non ebpv pedestal, DIY regulated return, fuel bowl delete, in tank mods, pac brake pxrb,6.0L Intercooler, Terminator T500 HPOP, 6 inch miter cut stacks . KW mud flaps w/custom mounts.
06 F350 CC LB

Last edited by DeputyDiesel; 08-09-2012 at 08:01 PM.
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