Upgraded Fuel Pressure Spring - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 25 (permalink) Old 04-13-2011, 03:52 AM Thread Starter
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Upgraded Fuel Pressure Spring

Where can i get one of these Upgraded Fuel Pressure Spring in town San Antonio Tx. will it make a diffrence on performance and mpg. Its for my 03 6.0
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post #2 of 25 (permalink) Old 04-13-2011, 03:58 AM
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Re: Upgraded Fuel Pressure Spring

ford or International dealer.....

performance, probably not, mpg, no.... but ill make your injectors last longer

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post #3 of 25 (permalink) Old 04-13-2011, 04:00 AM
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Re: Upgraded Fuel Pressure Spring

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Originally Posted by 03F250 6.0 View Post
Where can i get one of these Upgraded Fuel Pressure Spring in town San Antonio Tx. will it make a diffrence on performance and mpg. Its for my 03 6.0
You can order one here Tousley Ford Parts Depot or get one from Ford it will help your injectors because under 45lbs at WOT kills them so performance yes mpg ? no.
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post #4 of 25 (permalink) Old 04-13-2011, 04:09 AM Thread Starter
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Re: Upgraded Fuel Pressure Spring

Okay thanks guys i can pick one of these up at my local dealer right. how hard is it to install.
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post #5 of 25 (permalink) Old 04-13-2011, 11:28 AM
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Re: Upgraded Fuel Pressure Spring

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Originally Posted by 03F250 6.0 View Post
Okay thanks guys i can pick one of these up at my local dealer right. how hard is it to install.
i did mine last night, you just have to loosen and move the pipe above in and loosen the degas cap to relieve any pressure on the radiator hose.
make sure you remove and replace fuel filter because when you take the fuel line off, it would leak....all in all it wasn't too bad, getting that plastic pipe removed from the fitting on the top of the motor was a bitch though.
if i can do it, you can too.

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post #6 of 25 (permalink) Old 04-13-2011, 05:03 PM
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Re: Upgraded Fuel Pressure Spring

Anyone have a part # to this kit? Called ford today and got a super duper parts person
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post #7 of 25 (permalink) Old 04-13-2011, 05:27 PM
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Re: Upgraded Fuel Pressure Spring

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Originally Posted by donzimama View Post
Anyone have a part # to this kit? Called ford today and got a super duper parts person
I beleive the ford part # is 3-C3Z -9T517-AG
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post #8 of 25 (permalink) Old 04-13-2011, 06:39 PM
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Re: Upgraded Fuel Pressure Spring

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Originally Posted by 03F250 6.0 View Post
Okay thanks guys i can pick one of these up at my local dealer right. how hard is it to install.
Here you go
If you get a fuel pressure gauge and your pressure is low this is the fix.

Mine before i installed the fuel pressure gauge i had 50 lbs at idle and 44 at WOT and that is to low, installed the kit now 62 idle and 58 WOT, low fuel pressure will kill injectors and over 70 lbs may blow injector o-rings.

The Reg. Kit number is 3C3Z-9T517-AG and you get it form Ford
The spring is located behind the small plate that the return line attaches to. This is probably one of the easiest repairs you can make... Take the four screws loose (they are T-27 torx screws), change pull the old spring out of the brass cup, put the new spring in and re-install the plate. When you are taking it loose, keep your thumb on the plate so the spring/cup doesn't pop out and also use your thumb to hold the plate up tight to the fuel bowl when re-installing, so the screws can be threaded in good. If you buy the whole kit (which I think is the only way you can get it from Ford), I would replace the brass cup while you are at it..
You can see the plate and return line here.
Page 30: Fuel Supply System

I would not buy the aftermarket spring from GDS. It has been shown to raise pressure well beyond what is recommended and risks blowing the internal o-ring in your injectors
The only hard part is the hose is in the way, you need to get a turkey baster a new one and suck out all the fuel from the upper filter houseing that way you don't have a mess. After you are done you have to cycle the key 3 time 30 sec. each time to prime the fuel system. Hope this helps
Here is a great post on the install also with pictures love those pics.
Fuel Regulator Upgrade w/ Pictures - Diesel Forum - TheDieselStop.com
Hope this helps
2 stroker

06 F350 4x4 PSD Lariat FX4 CC LB
Edge Insight CTS-Expandable Pyro
AutoMeter Fuel Pressure Gauge
Fuel Reg. Kit 3C3Z-9T517-AG
Amsoil By-Pass(Amsoil 5w40)
Delo ELC-coolant Filter
pulling 14,000 lb Alpenlite 5er
97 F350 4x4 PSD CC LB
PacBrake&ATS converter lockup
3" dp 4" exhaust
TruCool 28,000 lb cooler
Tymar Intake
EGT,Boost,Trans
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post #9 of 25 (permalink) Old 04-14-2011, 01:05 AM
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Re: Upgraded Fuel Pressure Spring

go to http://www.partsguyed.com it is 56.40 on his sight
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post #10 of 25 (permalink) Old 04-14-2011, 02:09 AM Thread Starter
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Re: Upgraded Fuel Pressure Spring

go it at the dealer for 30.00 plus tax
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