Welcome to the North American Subaru Impreza Owners Club Friday March 29, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 09-15-2013, 06:18 PM   #1
2008SUBARUWRX
Scooby Newbie
 
Member#: 366926
Join Date: Aug 2013
Location: Des Moines IA
Vehicle:
2008 WRX Sedan

Default 2008 WRX boost issue

Hey guys I have a 2008 WRX and it has a cat back Agency Power Exhaust, K&N Short Ram Intake, Turbo XS BOV, but still on stock tune I'm pretty sure, and I'm having an issue with boost, when I go to get on it or anything I feel like the car is holding back, and like studdering a little bit if that makes any sense? Its kind of hard to explain, but it feels like I'm loosing boost then gaining it back right away but like it's cutting in an out, if anyone knows anything along these lines please let me know because this drives me crazy!! Thanks guys!!
* Registered users of the site do not see these ads.
2008SUBARUWRX is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 09-15-2013, 06:40 PM   #2
Blackfin
Scooby Specialist
 
Member#: 361325
Join Date: Jul 2013
Chapter/Region: E. Canada
Location: Ontario
Vehicle:
2010 STi
Dark Gray Metallic

Default

Pretty brave to put an SRI and catback without a proper tune.

You sure what you're feeling isn't misfiring?
Blackfin is offline   Reply With Quote
Old 09-15-2013, 10:23 PM   #3
Tripintaz
Scooby Specialist
 
Member#: 245218
Join Date: Apr 2010
Chapter/Region: South East
Location: FL
Vehicle:
2013 STI Limited

Default

Oh for the love of god....
Tripintaz is offline   Reply With Quote
Old 09-15-2013, 10:30 PM   #4
ProfessWRX
Scooby Specialist
 
Member#: 323379
Join Date: Jun 2012
Vehicle:
1992 Trans Am

Default

Quote:
Originally Posted by 2008SUBARUWRX View Post
but still on stock tune I'm pretty sure
You need to stay off the throttle until you know and/or scan the car. You could be in the process of blowing your motor... you could also be already dealing with a blown motor.
ProfessWRX is offline   Reply With Quote
Old 09-15-2013, 11:52 PM   #5
Bleichroeder
Scooby Newbie
 
Member#: 365470
Join Date: Aug 2013
Default

Quote:
Originally Posted by Blackfin View Post
Pretty brave to put an SRI and catback without a proper tune.

You sure what you're feeling isn't misfiring?
I've been told catbacks require no tune what so ever. Also, some SRIs such as TSX don't require a tune either. There's some very conflicting info floating around this forum.
Bleichroeder is offline   Reply With Quote
Old 09-16-2013, 01:51 AM   #6
Cathexis
Scooby Specialist
 
Member#: 335445
Join Date: Oct 2012
Chapter/Region: MAIC
Location: Ashland, VA
Vehicle:
2012 WRX - BLK STIG
Stg. 2 - 287whp/317wtq.

Default

No ones mentioned the BOV yet????

In conjunction with the intake.....

Oh my!
Cathexis is offline   Reply With Quote
Old 09-16-2013, 09:58 AM   #7
Bleichroeder
Scooby Newbie
 
Member#: 365470
Join Date: Aug 2013
Default

Quote:
Originally Posted by Cathexis View Post
No ones mentioned the BOV yet????

In conjunction with the intake.....

Oh my!

Ya know that's what I was gonna say. Your BOV is probably the culprate.
Bleichroeder is offline   Reply With Quote
Old 09-16-2013, 10:30 AM   #8
SlimJim8804
Scooby Specialist
 
Member#: 241943
Join Date: Mar 2010
Location: NNJ
Vehicle:
2065 Magic Carpet
Swirl Rally Bleu

Default

Tune that thing.
SlimJim8804 is offline   Reply With Quote
Old 09-16-2013, 11:12 AM   #9
Mr.Chow
Scooby Specialist
 
Member#: 256390
Join Date: Aug 2010
Chapter/Region: MWSOC
Location: WI
Vehicle:
2004 Baja Turbo
Dark Blue

Default

Mr.Chow is offline   Reply With Quote
Old 09-16-2013, 01:31 PM   #10
RoadKillDMD
Scooby Specialist
 
Member#: 284792
Join Date: Jun 2011
Chapter/Region: RMIC
Location: Vanilla Valley, CO
Vehicle:
2011 STI
Blurple

Default

Quote:
Originally Posted by Bleichroeder View Post

I've been told catbacks require no tune what so ever. Also, some SRIs such as TSX don't require a tune either. There's some very conflicting info floating around this forum.
MY08+ WRXs are REQUIRED to get a tune if a different intake is being used. MAF scaling WILL be off, and COULD potentially damage the engine. Unless he has taken it to a tuner for a base line to check if everything is running 'safely', there's no way to tell. OP needs a tune with that intake.
RoadKillDMD is offline   Reply With Quote
Old 09-16-2013, 01:37 PM   #11
takeadirtnap
Scooby Newbie
 
Member#: 344507
Join Date: Jan 2013
Chapter/Region: NESIC
Location: VT
Vehicle:
2010 WRX
OBP

Default

put it back to stock. Read all of the unibomber's posts. Re-read them. Study them. Then decide where to go from there.
takeadirtnap is offline   Reply With Quote
Old 09-16-2013, 01:50 PM   #12
Bleichroeder
Scooby Newbie
 
Member#: 365470
Join Date: Aug 2013
Default

Quote:
Originally Posted by RoadKillDMD View Post

MY08+ WRXs are REQUIRED to get a tune if a different intake is being used. MAF scaling WILL be off, and COULD potentially damage the engine. Unless he has taken it to a tuner for a base line to check if everything is running 'safely', there's no way to tell. OP needs a tune with that intake.
Aha, I was speaking in regards to an 07. Interesting!
Bleichroeder is offline   Reply With Quote
Old 09-16-2013, 03:14 PM   #13
2008SUBARUWRX
Scooby Newbie
 
Member#: 366926
Join Date: Aug 2013
Location: Des Moines IA
Vehicle:
2008 WRX Sedan

Default

Wow thanks for all the feedback guys! Getting kind of nervous now because of everything I've just read.. I bought the car the way it sits with all of those mods about 2 weeks ago, so I'm not sure if its tuned to be completely honest, is there any way to tell? I don't have a boost gauge installed yet but I just bought one so it will be soon.
2008SUBARUWRX is offline   Reply With Quote
Old 09-16-2013, 03:15 PM   #14
Bleichroeder
Scooby Newbie
 
Member#: 365470
Join Date: Aug 2013
Default

I'm a noob here but I would say hook that gauge up immediately check to see if you're running factory boost levels. Regardless you should get to a tuner ASAP and get **** sorted out.
Bleichroeder is offline   Reply With Quote
Old 09-16-2013, 03:17 PM   #15
acumenhokie
Scooby Specialist
 
Member#: 271479
Join Date: Jan 2011
Chapter/Region: MAIC
Location: Talleyville, DE
Vehicle:
2010 LGT
2009 FXT

Default

You can go ahead and start a WTB: Stock Intake thread
acumenhokie is offline   Reply With Quote
Old 09-16-2013, 03:22 PM   #16
2008SUBARUWRX
Scooby Newbie
 
Member#: 366926
Join Date: Aug 2013
Location: Des Moines IA
Vehicle:
2008 WRX Sedan

Default

Yes I will be doing both of those things very soon thanks guys.
2008SUBARUWRX is offline   Reply With Quote
Old 09-16-2013, 03:32 PM   #17
2008SUBARUWRX
Scooby Newbie
 
Member#: 366926
Join Date: Aug 2013
Location: Des Moines IA
Vehicle:
2008 WRX Sedan

Default

If I were to just get my car tuned with everything it has now will I be fine?
2008SUBARUWRX is offline   Reply With Quote
Old 09-16-2013, 04:34 PM   #18
Blackfin
Scooby Specialist
 
Member#: 361325
Join Date: Jul 2013
Chapter/Region: E. Canada
Location: Ontario
Vehicle:
2010 STi
Dark Gray Metallic

Default

If it's holding back and "studdering" and the cause is mechanical damage (e.g. a broken ringland), a tune will not fix the issue though it may prevent additional damage being done elsewhere in the engine.
Blackfin is offline   Reply With Quote
Old 09-16-2013, 04:49 PM   #19
2008SUBARUWRX
Scooby Newbie
 
Member#: 366926
Join Date: Aug 2013
Location: Des Moines IA
Vehicle:
2008 WRX Sedan

Default

So what should I do for starters like right away?
2008SUBARUWRX is offline   Reply With Quote
Old 09-16-2013, 05:14 PM   #20
nate_fisher
Scooby Specialist
 
Member#: 270482
Join Date: Jan 2011
Location: albany ny
Vehicle:
2011 turbotek fxt
11.85@117 4eat xt record?

Default

Tune it rite now!!
nate_fisher is offline   Reply With Quote
Old 09-16-2013, 06:50 PM   #21
xxKnight48xx
Scooby Newbie
 
Member#: 368492
Join Date: Sep 2013
Location: Florida
Vehicle:
2012 Impreza WRX
Black

Default

Buy an access port. I'm fairly new here but I have read several threads on here already that say. If you have an intake you need a tune right away. And also with the bov you need a tune as well. I had issues like this with my speed 3 where it would literally cut out and kick back on full boost right away. I tuned it and it never happened again.
xxKnight48xx is offline   Reply With Quote
Old 09-16-2013, 08:17 PM   #22
424wrx
Scooby Guru
 
Member#: 171948
Join Date: Feb 2008
Chapter/Region: Tri-State
Location: new york
Vehicle:
19 Sti
Crystal white

Default

Quote:
Originally Posted by xxKnight48xx View Post
Buy an access port. I'm fairly new here but I have read several threads on here already that say. If you have an intake you need a tune right away. And also with the bov you need a tune as well. I had issues like this with my speed 3 where it would literally cut out and kick back on full boost right away. I tuned it and it never happened again.
you cant tune for a vta bov. its metered air that should be left in the intake system. a good recirc bpv is the way to go over the plastic oem unit.
424wrx is offline   Reply With Quote
Old 09-16-2013, 08:23 PM   #23
xxKnight48xx
Scooby Newbie
 
Member#: 368492
Join Date: Sep 2013
Location: Florida
Vehicle:
2012 Impreza WRX
Black

Default

Quote:
Originally Posted by 424wrx View Post
you cant tune for a vta bov. its metered air that should be left in the intake system. a good recirc bpv is the way to go over the plastic oem unit.
I gotcha. The whole bpv/bov issue was a little confusing to me. Didn't mean to give misleading info.
xxKnight48xx is offline   Reply With Quote
Old 10-13-2013, 02:16 PM   #24
BOOstiN2008
Scooby Newbie
 
Member#: 370849
Join Date: Oct 2013
Default

I think you need to get a tune
BOOstiN2008 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 06:08 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.