Welcome to the North American Subaru Impreza Owners Club Friday April 18, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain

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.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 10-26-2008, 09:48 PM   #1
Snobaru
Scooby Newbie
 
Member#: 177697
Join Date: Apr 2008
Location: Northern NJ
Vehicle:
2005 Saab 9-2x Aero
Desert Silver Metallic

Default Stock 05 WRX - Hesitation around 3K RPM at WOT

Hello Everyone,

I am newbie to NASIOC and the forum, just got my first 2005 SAAB 9-2x Aero (WRX Wagon). It's a 2005 with 27,000miles. Everything is bone stock and the car is well maintained with all dealer service records.

My background is with the VW/Audi 1.8t drivetrains for many years.

Here is my issue..

It seems that on a couple of occasions, that I had this weird hesitation around 3,000 - 3,750rpms, almost wide open throttle, as if the ignition or boost cut out for a split second and then everything is good again. Typically in 2nd or 3rd gear. No engine lights.

At WOT, I can reach almost 1 bar of boost. I always run 93 octane.

In the VW/Audi world, I would chalk this up to a possible leaking bypass valve, but would have better direction as typically this scenerio would through an engine code for "desired boost not reached".

Is this a common issue with this motor (EJ205)? Is there somewhere where I should look first in order to find and resolve my issue?

I really appreciate all of your help and experience!!;)
* Registered users of the site do not see these ads.
Snobaru is offline   Reply With Quote
Old 10-26-2008, 10:09 PM   #2
JSarv
Scooby Specialist
 
Member#: 163445
Join Date: Nov 2007
Chapter/Region: MWSOC
Location: Effingham IL (Central IL)
Vehicle:
l33t *******
12.07@115.9mph-EJ205

Default

All stock I assume? If so I do believe this is a drop in the oe timing tables. My car had it until I learned to tune via open source. Timing on the stock rom is really weird, pretty jumpy.. If it was higher, say 4k or so I would say you are hitting a higher load value, which would drop the timing off a bit and could cause a bit of a slugish feeling for a split second...


Maybe I'm wrong?
JSarv is offline   Reply With Quote
Old 10-26-2008, 10:13 PM   #3
Snobaru
Scooby Newbie
 
Member#: 177697
Join Date: Apr 2008
Location: Northern NJ
Vehicle:
2005 Saab 9-2x Aero
Desert Silver Metallic

Default

Could be at around 4,000 rpm. All stock. I found something while searching around that pertains to "open/closed loop" situations for 04+ WRXs. Can this apply here?
Snobaru is offline   Reply With Quote
Old 10-27-2008, 06:38 AM   #4
Spenk
Scooby Guru
 
Member#: 7164
Join Date: Jun 2001
Location: I Appear Missing
Vehicle:
2000 Miata LS
Evo Orange Mica (1/644)

Default

It's just the crap factory tune. While the OL/CL issue isn't as bad as on the 2004 cars, it's still a tune that's more concerned with hitting tailpipe emission targets than making power.

Solution: find a used AP v1 (make sure it's for a 2005 5MT 2.0l) in the classifieds for $300, flash to Stage One and enjoy.

And by the way -- Saabarus are the shiz!
Spenk is offline   Reply With Quote
Old 10-27-2008, 09:02 AM   #5
Dutchman1101
Scooby Newbie
 
Member#: 155735
Join Date: Aug 2007
Chapter/Region: RMIC
Location: Lakewood, CO
Vehicle:
2005 '05 LGT LTD
Satin White Pearl

Default

Quote:
Originally Posted by Spenk View Post
It's just the crap factory tune. While the OL/CL issue isn't as bad as on the 2004 cars, it's still a tune that's more concerned with hitting tailpipe emission targets than making power.

Solution: find a used AP v1 (make sure it's for a 2005 5MT 2.0l) in the classifieds for $300, flash to Stage One and enjoy.

And by the way -- Saabarus are the shiz!
While Stage 1 does kick the factory tunes ass, I'd take it in to get checked out. IMO getting stage one might be masking some bigger problem. It's probably nothing major but better to be safe then sorry.

Spenk-Are you a Panic fan by chance? I noticed you have a LG&M reference in your info.
Dutchman1101 is offline   Reply With Quote
Old 10-27-2008, 08:23 PM   #6
Snobaru
Scooby Newbie
 
Member#: 177697
Join Date: Apr 2008
Location: Northern NJ
Vehicle:
2005 Saab 9-2x Aero
Desert Silver Metallic

Default

Thanks everyone!

Just a personal opinion, would you take this car to SAAB because it is still under factory warrant and risk that they don't know the quirks of a Subaru or to a Subaru dealer, pay the labor because the car ultimatly is a Subaru?
Snobaru is offline   Reply With Quote
Old 10-28-2008, 01:01 AM   #7
SlverEJ20
Scooby Specialist
 
Member#: 157158
Join Date: Aug 2007
Chapter/Region: MAIC
Location: Fairfax, Va
Vehicle:
05 WRX stage 2
PSM

Default

Try flashing to stage one and see if that helps. It was like night and day for me.
SlverEJ20 is offline   Reply With Quote
Old 10-28-2008, 02:23 AM   #8
Audiosavvy
Trust me, I'm a scientist
Moderator
 
Member#: 150794
Join Date: Jun 2007
Chapter/Region: SCIC
Location: Bakersfield, CA
Vehicle:
Qcab dakota 4x4
LT1 Formula Firebird

Default

Sounds to me like the factory tune, which is crap. Some timing and a better tune should smooth that out, unless you have some actual problems.

If your car is tuned and for some reason goes into limp mode, you will experience similar results for similar reasons.
Audiosavvy 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
06 WRX Hesitation between 3000 RPM - 5000 RPM dao Newbies & FAQs 11 01-19-2012 11:56 AM
Can 3K make my Stock 05 WRX as fast as a STI? eshtog General Community 18 06-29-2004 09:47 AM
Car hesitates above 3K rpms SIMPFLY Factory 2.0L Turbo Powertrain 12 05-02-2004 08:20 PM
When does boost kick in? At RPM? At WOT? rharder Factory 2.0L Turbo Powertrain 3 07-25-2002 08:27 PM


All times are GMT -4. The time now is 07:59 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.