Stock 05 WRX - Hesitation around 3K RPM at WOT

Snobaru · 10-26-2008, 09:48 PM

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.

JSarv · 10-26-2008, 10:09 PM

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?

Snobaru · 10-26-2008, 10:13 PM

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?

Spenk · 10-27-2008, 06:38 AM

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!

Dutchman1101 · 10-27-2008, 09:02 AM

Quote:

Originally Posted by Spenk

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.

Snobaru · 10-27-2008, 08:23 PM

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?

SlverEJ20 · 10-28-2008, 01:01 AM

Try flashing to stage one and see if that helps. It was like night and day for me.

Audiosavvy · 10-28-2008, 02:23 AM

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.

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	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.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

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

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	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?

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	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?

10-27-2008, 06:38 AM	#4
Spenk Scooby Guru Member#: 7164 Join Date: Jun 2001 Location: A World Of Noise Vehicle: ---> Spoiler alert: Everyone dies at the end.	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!

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	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?

10-28-2008, 01:01 AM	#7
SlverEJ20 Scooby Specialist Member#: 157158 Join Date: Aug 2007 Chapter/Region: MAIC Location: Richmond/ Fairfax, Va Vehicle: 05 WRX stage 2 PSM	Try flashing to stage one and see if that helps. It was like night and day for me.

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	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.