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fuel pressure regulator mod
Postmaster
Joined: Jun 2005
Posts: 3,438
Likes: 0
From: New Hampshire
Originally Posted by jtharvey
Would an HPX line help with that too? How does increasing the fuel pressure with shims work in conjunction with a tuner or chip?
I didn't know that the number 8 injector was starved for fuel. I'm always learning something new here.
I didn't know that the number 8 injector was starved for fuel. I'm always learning something new here.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by jtharvey
So what about shimming the FPR in conjunction with a tuner or chip? Does the chip or tuner increase the fuel pressure? Or can the fuel pressure only be increased by mechanical means?
Posting Guru
Joined: Feb 2004
Posts: 2,248
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From: Elverson, PA
With a chip or tuner - you are calling for MORE fuel - but it can't change the pressure - so if you've already got a low pressure problem - you might notice the FIX more, than with a stock setup.
Edit - ahh Kwik beat me anyhow - stupid hunt and peck
Edit - ahh Kwik beat me anyhow - stupid hunt and peck
Postmaster
Joined: Jun 2005
Posts: 3,438
Likes: 0
From: New Hampshire
Originally Posted by jtharvey
So on my 6-Gun tuner (one of the first mods I bought-wouldn't do it again), there is a plug that goes into the ICP. Is this just telling the ICP to give it more fuel?
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Senior User
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Originally Posted by SpringerPop
HPX= High Pressure Crossover. The HPOP's output, high-ressure oil, is regulated. The sensor is connected to only one head's "rail". Installing the HPX provides a connection for both high-pressure oil rails to work together. The end result is better high-pressure oil regulation, allowing the optimum for both rails to be equal pressure no matter individual demands. Typically, you'll notice a smoother idle.
Pop
Pop
So is this the fix for this or not?? Was this ever fixed by Ford? Is there a certain year this was not an issue any longer?? and lastly, how big of an issue is this really?? Does it cause damage, or just a little less power created in the one cylinder?
On another note, if you were to shim and get higher fuel pressure, it would be smart to use a tuner to shorten the pulse width so you get the same amount of fuel as before you raised the pressure, correct??
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by jberylecrider
On another note, if you were to shim and get higher fuel pressure, it would be smart to use a tuner to shorten the pulse width so you get the same amount of fuel as before you raised the pressure, correct??
I am of the opinion that you don't want to shim beyond 70 psi. Push a design too far out of it's perameters and you'll start creating side issues that are unknown until they pop up. I mostly want to prevent unnecessary leaks.
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