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01-08-2012, 07:18 PM | #1 |
Scooby Newbie
Member#: 273955
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: Orford, NH
Vehicle:2011 WRX Prem. Hatch DGM |
'11 WRX rough idle when coming to stop
Hi, my 2011 WRX has started hesitating a little bit when I'm coming to a stop. Just after I put the clutch in shift into neutral to come to a stop the RPMs dip to 500 or so and I can feel the stick shift vibrate a little. It feels almost like the car is going to stall for a split second and then the revs come back up to normal. Seems to be happening since the weather got colder.
Any ideas what might be causing this?
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01-08-2012, 07:21 PM | #2 |
Scooby Newbie
Member#: 154534
Join Date: Jul 2007
Chapter/Region:
MAIC
Location: Richmond, VA
Vehicle:2018 WRX STI Limited Black |
do you have a bov, lightweight pulley or flywheel?
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01-08-2012, 07:29 PM | #3 |
Scooby Specialist
Member#: 157982
Join Date: Aug 2007
Chapter/Region:
MWSOC
Location: Warrenton, MO
Vehicle:2002 Impreza WRX World Rally Blue |
Mine did that when it was flooding because of a bad tune/lack there of...
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01-08-2012, 07:31 PM | #4 |
Scooby Newbie
Member#: 270371
Join Date: Jan 2011
Vehicle:2004 sti grey |
modifications?
have had any work done lately or just the colder weather |
01-08-2012, 07:32 PM | #5 |
Scooby Newbie
Member#: 273955
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: Orford, NH
Vehicle:2011 WRX Prem. Hatch DGM |
The car is bone stock. I've done the break-in and subsequent oil changes myself with Rotella T6. The last oil change was 11/06 but this behavior just started within the last week or so.
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01-08-2012, 09:24 PM | #6 |
Scooby Newbie
Member#: 83820
Join Date: Mar 2005
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mine just started doing it with the colder temps as well. It's probably a rich condition caused by the cold, dense air?
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01-09-2012, 07:59 AM | #7 | |
Scooby Newbie
Member#: 300431
Join Date: Nov 2011
Chapter/Region:
MAIC
Location: N. Virginia
Vehicle:2012 WRX STi ISM |
Quote:
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01-09-2012, 10:13 AM | #8 |
Scooby Newbie
Member#: 273214
Join Date: Feb 2011
Chapter/Region:
MWSOC
Location: Columbus,OH
Vehicle:2013 WRX Limited CBP |
The compressor should not be going out on such a new car... I think the stock tune could also be to blame, because I have not seen the problem even in some temps down below 20 deg F
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01-09-2012, 11:45 AM | #9 | |
Scooby Newbie
Member#: 77637
Join Date: Dec 2004
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Quote:
Subaru replaced it no questions asked. |
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01-09-2012, 11:58 AM | #10 | |
Scooby Newbie
Member#: 273955
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: Orford, NH
Vehicle:2011 WRX Prem. Hatch DGM |
Quote:
@JordanM9 - Regarding things that shouldn't happen to a brand new car, I've had the passenger side blinker and driver side daytime bulb blow already. So I'm willing to accept that anything could go wrong. Last edited by toolie; 01-09-2012 at 03:53 PM. |
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01-09-2012, 08:26 PM | #11 |
Scooby Newbie
Member#: 273955
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: Orford, NH
Vehicle:2011 WRX Prem. Hatch DGM |
Turning off the auto climate control didn't help.
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01-09-2012, 08:54 PM | #12 |
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Vehicle:06 Red Ltd.Wagon Dom 1.5xtr JJ tuned |
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01-09-2012, 09:33 PM | #13 |
Scooby Specialist
Member#: 132140
Join Date: Nov 2006
Chapter/Region:
SCIC
Location: '06 Wrx CGM - Retired
Vehicle:'11 WRX Hatch SSM |
Joining this thread - my 2011 does this also. Not all the time, but enough that i noticed it and began to worry
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01-09-2012, 09:59 PM | #14 |
Scooby Newbie
Member#: 289032
Join Date: Jul 2011
Chapter/Region:
NESIC
Location: MA
Vehicle:2012 WRX sedan Plasma Blue Pearl |
I have noticed my 2012 does this as well. Kinda bothers me :/
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01-09-2012, 10:56 PM | #15 |
Scooby Specialist
Member#: 235650
Join Date: Jan 2010
Chapter/Region:
Tri-State
Location: Long Island
Vehicle:2011 WRX SWP |
Mine does the same thing. Only happened a handful of times though.
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01-10-2012, 12:28 AM | #16 |
Scooby Newbie
Member#: 273955
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: Orford, NH
Vehicle:2011 WRX Prem. Hatch DGM |
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01-10-2012, 12:30 AM | #17 | |
Scooby Newbie
Member#: 273955
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: Orford, NH
Vehicle:2011 WRX Prem. Hatch DGM |
Quote:
Doesn't seem to matter if the engine is cold or fully up to temp. |
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01-10-2012, 02:06 AM | #18 |
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Join Date: Jul 2009
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My 08 has done that in the past except mine was sometimes during 75 degree weather and sometimes with 20 degrees. It didn't seem to matter to much. It worried me when it would do it because there is nothing you can do. The clutch is in and im stopped, you hit the gas to get the revs up but that doesn't help. Im glad to know im not the only one who this has happened to.
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01-10-2012, 09:18 AM | #19 |
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I had an issue like this on my 08 wrx. The tumbler valve generator had to be replaced. The master tech at the dealership knew what was wrong and said its common to have to replace them. You can thank the EPA for having to have them in the first place.
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01-10-2012, 11:38 AM | #20 |
Scooby Specialist
Member#: 260545
Join Date: Oct 2010
Chapter/Region:
MAIC
Vehicle:2011 WRX Limited 4dr WRB |
have had this problem since I've owned my 2011...happens randomly and is often the cause of a random stall (like when reversing out of a parking space, then shifting to first and starting to move). If the dips coincide with when you try to get rolling, it makes stalling very easy. It doesn't really bother me any more because I am now used to all of the shifting quirks of my car. I do recall seeing a thread a while ago on this same topic and having other people quote the TGVs as the issue as well.
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01-10-2012, 12:17 PM | #21 |
Scooby Newbie
Member#: 273955
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: Orford, NH
Vehicle:2011 WRX Prem. Hatch DGM |
I blew an email into my dealer last night to see if they had heard of this happening before now that it seems at least a few of us have had the problem. Probably won't hear back. Now maybe I'll call and ask about this tumbler valve generator.
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01-10-2012, 12:46 PM | #22 |
Scooby Newbie
Member#: 301561
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MAIC
Location: NOVA
Vehicle:2012 WRX LTD 5 Door Ice Silver Metallic |
I've read that this is normal behavior for all subarus in cold weather, heat on, etc.
My 2012 occasionally will dip at idle but all the times I've noticed it happening was with the air compressor on manual mode (i don't use auto). It doesn't bother me because of the infrequency. If it actually affected my drive, I'd be a little more concerned, or if my air didn't work.... |
01-10-2012, 01:07 PM | #23 | |
Scooby Newbie
Member#: 304018
Join Date: Dec 2011
Chapter/Region:
RMIC
Location: Greenwood Village, CO
Vehicle:2011 WRX Sedan TP Stage 1 |
Quote:
Edit: forgot to mention that I can replicate the issue consistently, whether or not the a/c, defrost is on. |
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01-10-2012, 01:42 PM | #24 | |
Scooby Newbie
Member#: 273955
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: Orford, NH
Vehicle:2011 WRX Prem. Hatch DGM |
Quote:
It effects my driving very much. I'm constantly anticipating it now, which is annoying. And I have to wait a beat every time it happens for it to sort itself out rather than proceeding. I admit I'm more of a rolling stop kind of guy, shoot me. I've set up an appointment to have the car looked at on Thursday and I'll report back. |
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01-10-2012, 02:34 PM | #25 |
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SCIC
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Vehicle:11 STI sedan SWP |
These low engine speed conditions are somewhat common on newer cars to lower emmissions at idle and similar situations. As long as the car doesn't stall, it's nothing to spend too much time on. The ECU is trying to keep the injectors off for as long as possible and doesn't turn them back on (idle is about 2.0-2.2mS) until a little later. Then as you sit there, the ECU is trying to run as lean as possible to save fuel. A rock solid idle is not something that is expected these days because most people have no idea what that tachometer means anyway.
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