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Old 02-22-2010, 10:33 PM   #1
dao
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Member#: 134360
Join Date: Dec 2006
Chapter/Region: NESIC
Location: MA
Vehicle:
2006 WRX
OBP

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I've had my 06 wrx for a few months now. It's bone stock, and it has 56,000 miles. Today I picked up my car from service after getting the O2 sensor replaced, and a "Valve Air Suction."

In first gear, at WOT between 3K - 5K RPM, the car performs fine. But right after I shift into 2nd and 3rd gear at 3K - 5K RPM, the car feels like its hesitating. Then I decided to reset the ECU by disconnecting the negative cable on the battery, and holding the brake down for about 10 seconds to drain any residual charge and placed the cable back on afterwards. Next, I warmed the car up for 3 minutes and took another test run.

I drove normally to the nearest Shell gas station, about two miles from my house. Pumped gas, and took off and repeated the steps as above stated. The results are the same as in stuttering and hesitation. I'm bringing it to the dealership since it's still under warranty. Thank goodness there's no mods on the vehicle yet.

Are there any ideas of what may be the problem?

Thanks!
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Old 02-22-2010, 10:58 PM   #2
GripS
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Join Date: Nov 2009
Chapter/Region: NWIC
Location: Washington
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Seeing as how you are coming up on 60K you are due for plug replacements. Hesitation can be caused by any number of things. It's a good thing you are still under warranty.
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Old 02-22-2010, 11:08 PM   #3
fl4tsc
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Member#: 177247
Join Date: Apr 2008
Chapter/Region: South East
Location: Hilton Head and Clemson, SC
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2005 WRB WRX
16GXT + 44mm EWG = wahhh!

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ya plugs would be a good thing to check...

also any check engine codes at all?
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Old 02-22-2010, 11:24 PM   #4
dao
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OBP

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Quote:
Originally Posted by tallterror View Post

also any check engine codes at all?
P2442 = Secondary Air Injection System Switching Valve Stuck Open Bank 2 --> O2 Sensor = Replaced
P0137 = Valve Air Suction...service said that they had to also replace a valve while replacing the O2 sensor.
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Old 02-22-2010, 11:49 PM   #5
spinningcain
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Chapter/Region: SWIC
Location: Las Vegas
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Clean you maf
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Old 02-23-2010, 12:41 AM   #6
vinxH
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Location: Los Angeles
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hear any leaks?
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Old 02-23-2010, 02:09 AM   #7
dao
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Quote:
Originally Posted by spinningcain View Post
Clean you maf
will do

Quote:
Originally Posted by vinxH View Post
hear any leaks?
not sure...what should i listen for?
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Old 02-23-2010, 03:08 AM   #8
Soobie22
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Do a boost leak test, more than likely it may not be one, but it wont hurt to try. Pain in the ass in a subaru tho.
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Old 02-23-2010, 08:18 AM   #9
BoostinChick
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Quote:
Originally Posted by dao View Post
not sure...what should i listen for?
Quote:
Originally Posted by Soobie22 View Post
Do a boost leak test, more than likely it may not be one, but it wont hurt to try. Pain in the ass in a subaru tho.
You can either try spraying soapy water and see where it bubbles, spraying carb cleaner and see if the engine RPM's rise, or a boost leak test with an actual tester + bike pump/compressor. A couple methods to try. I am sure YouTube will have a DIY for them.

I would go the spark plug route first though. Usually with boost leaks it may idle funky as well.
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Old 02-23-2010, 12:42 PM   #10
SupersayianNeo
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So the hesitation only existed after the dealership serviced your car?

Gary, come by and ill take a look at it...
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Old 02-23-2010, 01:04 PM   #11
dao
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Quote:
Originally Posted by SupersayianNeo View Post
So the hesitation only existed after the dealership serviced your car?

Gary, come by and ill take a look at it...
Yeah, it happened after it was serviced. I did hear a hissing sound though underneath the exhaust area when I turned off my car. A possible exhaust leak maybe the issue itself or part of the problem.
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Old 01-19-2012, 11:56 AM   #12
mosley570
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Check for leaks near the turbo and around the new o2 sensor if its the one before the cat. Could have knocked something loose at the dealer and ****ed up a vacuum somewhere. Funny how a small air leak can cause a car to run like complete ****. Also 60k is a good time for plugs and wires.
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