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  #1  
Old 04-23-2008, 06:30 PM
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FPR Shim

can anyone tell me in detail how to do the fpr shim mod.
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Old 04-23-2008, 06:41 PM
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here ya go OBS FPR Shim and Gauge Install
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Old 04-23-2008, 07:42 PM
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thanks strokin94
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Old 04-23-2008, 07:56 PM
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no problem.....thats what were all here for
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Old 04-23-2008, 08:04 PM
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does the mod make much of a difference? are there any risks? If no risks, it cant hurt performance to try it.
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Old 04-25-2008, 11:20 AM
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I just did the mod 5 mins. after reading this post and am happy with the slight gain that I got. I don't have a chip yet so these cheap mods sure do help. I also realized that my fuel pressure sending unit for my guages are in the wrong location so I will fix that this weekend.
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Old 04-27-2008, 09:42 AM
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if i do this mod do i need to put a gauge in or will i be fine with out one?
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  #8  
Old 04-27-2008, 05:37 PM
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Quote:
Originally Posted by groomzybanshee View Post
if i do this mod do i need to put a gauge in or will i be fine with out one?
You don't have to use a permanent gauge. You can just use a mechanic's gauge at the schrader valve to check the pressure after the shim. You need to make sure the pressure isn't over 70 psi so it doesn't damage the pump.
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Old 04-27-2008, 06:42 PM
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I'm gonna do this mod later in the week. I read the instructions and i have a few questions. One, when I release pressure from the schrader valve will diesel spray out? Two, after I shim the fpr and install the gauge do i have to repressurize the system with something or when i start the truck will it do it by it's self?

Last edited by 7.3TurboDiesel; 04-27-2008 at 06:46 PM.
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  #10  
Old 04-27-2008, 06:52 PM
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Quote:
Originally Posted by 7.3TurboDiesel View Post
I'm gonna do this mod later in the week. I read the instructions and i have a few questions. One, when I release pressure from the schrader valve will diesel spray out? Two, after I shim the fpr and install the gauge do i have to repressurize the system with something or when i start the truck will it do it by it's self?
I have never had fuel spray out, but to be on the safe side, I put a rag over it when pressed. You don't have to do anything other crank it and check the pressure after the install.
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