help fuel pump questions
Junior User
Joined: Sep 2010
Posts: 54
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From: Ft. Lewis
My truck is a 2004 F250 and i did the spring swap and it boosted my fuel pressure to 80-90psi at idle and at wot it jumps down to 20psi, it also feels ***** less now with the spring mod. Now is that a fuel pump issue?
Logistics Pro
Joined: Mar 2007
Posts: 4,604
Likes: 4
From: Claremore, OK
Sounds like you didn't get the popit in there right. What was your pressure before the install? If 20 is an actual pressure...STOP driving the truck before you roast the injectors.
Junior User
Joined: Sep 2010
Posts: 54
Likes: 0
From: Ft. Lewis
Under normal driving conditions it sits around 70-90psi I baby the throttle so my fuel pressure stays above 50psi. With the factory spring my pressure at idle was around 50psi and wot it was at about 35psi witch is why I did the spring upgrade.
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
I still don't understand why you're replacing your fuel pump. Your pressures are low. But those are pretty normal low pressures for someone with the factory fuel pressure regulator spring. What you need to do is to upgrade to the new fuel regulator spring and see what you get.
I'm willing to bet a new fuel pump is going to leave you with exactly the same pressures you have now.
I'm willing to bet a new fuel pump is going to leave you with exactly the same pressures you have now.
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New User
Joined: Jan 2012
Posts: 8
Likes: 0
the truck has been sitting in my side yard for 2 months now. im going to do the spring fuel pump and my #8 injector all at once. i just dont want to take a chance. once less thing i have to worry about i hope.i guess it would be preventive work
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carguy3j
1999 - 2003 7.3L Power Stroke Diesel
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Dec 30, 2015 11:25 AM
