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Old 01-15-2014, 05:40 AM   #1
Neilm
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Member#: 345975
Join Date: Feb 2013
Location: vancouver
Vehicle:
2013 wrx STI
white

Default anyone else with grb FPR problems?

has anyone else had fuel pressure regulator problems on the 08+ sti?
i will be taking mine in for warranty in the next couple days, but i just wanted to know if anyone else has had the same problem and if you upgraded or what you did.
thanks,
Neil
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Old 01-15-2014, 10:59 AM   #2
mrjason
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Chapter/Region: VIC
Location: Burnaby
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2004 STI
WRB

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What's the problem you have?
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Old 01-15-2014, 11:33 AM   #3
DIGGYGV8
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Join Date: Mar 2012
Chapter/Region: VIC
Location: Burnaby
Vehicle:
2011 STi Sedan
SWP

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Quote:
Originally Posted by Neilm View Post
has anyone else had fuel pressure regulator problems on the 08+ sti?
i will be taking mine in for warranty in the next couple days, but i just wanted to know if anyone else has had the same problem and if you upgraded or what you did.
thanks,
Neil
nothing here *knock on wood*, also interested to see what happened to yours?
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Old 01-15-2014, 12:50 PM   #4
Bruere
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Join Date: Apr 2013
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1998 STi RA V-Ltd
Super Mica Blue

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Don't they **** out and provide less than adequate pressure to the injector for cylinder #4?
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Old 01-15-2014, 04:11 PM   #5
Neilm
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2013 wrx STI
white

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well recently my car has started bucking, lurching, and stumbling, and just not getting any fuel! it will start off from a stop fine then it will just loose all fuel and won't let me go over 1300rpm then it will decide hey lets give it some fuel and just throw you back into your seat and drive normally for a minute until it starts to hit boost where it will do the same thing again..
it's kind of hard to explain but it's pretty violent
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Old 01-15-2014, 04:13 PM   #6
DIGGYGV8
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Location: Burnaby
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SWP

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Quote:
Originally Posted by Neilm View Post
well recently my car has started bucking, lurching, and stumbling, and just not getting any fuel! it will start off from a stop fine then it will just loose all fuel and won't let me go over 1300rpm then it will decide hey lets give it some fuel and just throw you back into your seat and drive normally for a minute until it starts to hit boost where it will do the same thing again..
it's kind of hard to explain but it's pretty violent
that's messed up. running any tune on the car?
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Old 01-15-2014, 05:05 PM   #7
Bruere
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Super Mica Blue

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So you're essentially having a misfire/non-ignition at a certain amount of load? Have you actually checked the fuel pressure?
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Old 01-15-2014, 05:16 PM   #8
DIGGYGV8
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I'm gonna go with a really screwed up map or clogged/leaky tubes of some kind.

If it's dropping fuel, it shouldn't come back, it would stall. Unless by "loose all fuel" you mean that it doesn't proceed to accelerate.
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Old 01-15-2014, 07:08 PM   #9
Outlaw44
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Totally unrelated but this is what my garbage trucks does, it's a regen problem so ecu retards everything Boggs when in boost then eventually after misfiring for about 30mins boom!!! Huge cloud of smoke and get all power back, usually cause by ****ty fuel and clogged fuel filters.
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Old 01-16-2014, 12:39 AM   #10
jstbstn
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Chapter/Region: VIC
Location: jameson@dalesmotorsport.com
Vehicle:
02 WRX - Stage WTF
04 WRB WRX Wagon - Stg 2+

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Many subaru dealer's are now recommending a fuel system cleaning and decarb service every 60,000km or less because of the issues with misfires being so common. This is even more relevant after 08 when they changed filtration in the fuel system. Anytime we get a subaru in with misfire codes now this is the first service we perform and so far the results have been very good. I did the service on my 04 in November and even though both my in tank and engine bay filters were less than 6 months old, it still gave noticeable results in fueling performance, smoothness of the car and afr swings at idle on the wideband we're much narrower. This could potentially be a very good place to start.
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Old 01-16-2014, 11:20 AM   #11
mrjason
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WRB

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If you've got a FPR w/ a gauge, I'd suggest you keep an eye on it to actually see what the pressure is showing. Doubtful the FPR its self sounds like the problem. At the same time, you can always go back to stock to rule it out?

Do you have a FMIC? Or stock top mount?
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Old 01-22-2014, 02:19 PM   #12
Kuros
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Chapter/Region: SWIC
Location: Reno, NV
Vehicle:
2011 STi boosted FRS
04 sti

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Id like to know if replacing the FPR fixed your problem.
Ive been having similar issues, FPR and dampers are next on my list to check
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Old 01-23-2014, 01:36 AM   #13
Mad_Max_2010
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Location: Port Moody
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waranty
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Old 01-23-2014, 03:09 AM   #14
Neilm
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wow, ok sorry for the delay i lost my password.. anyways car is stock other than a cat back and a stage 1 tune, i recently removed the tune and it's still doing it, so i know thats not the issue, i haven't had time to get it back to subaru for warranty just yet, waiting to get my truck running a bit better, i'd rather not drive one of the loner sponges they have so...
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