Fuel pump dieing?
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Junior User
Joined: Sep 2010
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From: Ft. Lewis
Fuel pump dieing?
I have a 2004 F250 6.0L, 4in lift, 35in tires, Amsoil oil bypass filter+cooler, soon a coolant filter, and i just did a blue spring upgrade. I took it out for a test drive and heres what i got for fuel pressure
Idle-66psi
20%-60psi
30%-54psi
40%-48psi
50%-40psi
WOT-20psi
I changed the fuel filters about 6000 miles ago and im guna change them again tomorrow and see if that works. Any other ideas? Im thinking if that dosent work maybe a fuel pump?
Idle-66psi
20%-60psi
30%-54psi
40%-48psi
50%-40psi
WOT-20psi
I changed the fuel filters about 6000 miles ago and im guna change them again tomorrow and see if that works. Any other ideas? Im thinking if that dosent work maybe a fuel pump?
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
I'd double check that regulator update install before buying a pump. Maybe blow some air through the lines. Hopefully you're on the right track with the filters though. Good luck!
After thought: I wonder if the fuel pressure test port is before or after the regulator part of the filter housing?
After thought: I wonder if the fuel pressure test port is before or after the regulator part of the filter housing?
Last edited by Rusty Axlerod; Apr 17, 2012 at 09:46 PM. Reason: Add
Cargo Master
Joined: May 2006
Posts: 2,116
Likes: 6
From: Florida
The only thing I wonder is how much air in the line can affect the pressure reading. Since a liquid cannot compress but air can. If there is any air in those lines including the one to the pressure sender it will affect the reading. That is why the strictly diesel one is so well engineered it has the shrader valve right where the sender is installed . It allows you to bleed off any trapped air so that the sender is only getting fuel
Hotshot
Joined: Jul 2005
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From: Middle Tn.
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Fleet Owner
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It is after, it is reading the pressure right as it goes to the injectors. In other words it should be the same there as at the injector from what I understand.
The only thing I wonder is how much air in the line can affect the pressure reading. Since a liquid cannot compress but air can. If there is any air in those lines including the one to the pressure sender it will affect the reading. That is why the strictly diesel one is so well engineered it has the shrader valve right where the sender is installed . It allows you to bleed off any trapped air so that the sender is only getting fuel
The only thing I wonder is how much air in the line can affect the pressure reading. Since a liquid cannot compress but air can. If there is any air in those lines including the one to the pressure sender it will affect the reading. That is why the strictly diesel one is so well engineered it has the shrader valve right where the sender is installed . It allows you to bleed off any trapped air so that the sender is only getting fuel
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