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Old 01-11-2012, 12:41 PM   #26
donkey_cart
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Last edited by donkey_cart; 12-13-2013 at 04:53 PM.
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Old 01-12-2012, 02:42 PM   #27
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I'm at the dealer now. They took it for a spin and were able to verify the issue. Apparently there was a software update that has been able to resolve this known problem. It's back out for another road test to make sure everything is cool.

I mentioned the tumbler valve generator but they seem to think the software fix is the way to go. We'll see after I drive it.
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Old 01-12-2012, 03:12 PM   #28
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Quote:
Originally Posted by toolie View Post
I'm at the dealer now. They took it for a spin and were able to verify the issue. Apparently there was a software update that has been able to resolve this known problem. It's back out for another road test to make sure everything is cool.

I mentioned the tumbler valve generator but they seem to think the software fix is the way to go. We'll see after I drive it.
That's good news! Let us know how the drive goes. Hopefully your issue has been resolved with the update. If it is, i will definitely be brining mine in to the dealer.
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Old 01-12-2012, 09:18 PM   #29
toolie
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It seems to be resolved. The revs still drop and then pop up again but they don't drop to the point of choking like before. I'm cautiously optimistic.

Sadly I forgot to ask when the update was released. If ande7824 is experiencing this with his 2012 it would suggest it's been released very recently. Assuming this is actually the problem.

They told me they send letters out to owners when updates like this come out. Either I've chucked it without reading or it's so new that it hasn't gone out yet because I haven't seen one.
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Old 01-12-2012, 10:20 PM   #30
JordanM9
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convenient software update fix... i think they just want to bring their cars in so they can make sure no1 is modding the car, but it could be true bc i dont have this problem and my car has the AP on it
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Old 01-12-2012, 10:29 PM   #31
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Quote:
Originally Posted by toolie View Post
It seems to be resolved. The revs still drop and then pop up again but they don't drop to the point of choking like before. I'm cautiously optimistic.

Sadly I forgot to ask when the update was released. If ande7824 is experiencing this with his 2012 it would suggest it's been released very recently. Assuming this is actually the problem.

They told me they send letters out to owners when updates like this come out. Either I've chucked it without reading or it's so new that it hasn't gone out yet because I haven't seen one.
I still have it. When driving it today it nearly died at a stoplight when I was in stop and go traffic. I have an accessport on the way, so I am thinking I will just go Stage I and just say screw the update...
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Old 01-12-2012, 10:36 PM   #32
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Originally Posted by ande7824 View Post
I still have it. When driving it today it nearly died at a stoplight when I was in stop and go traffic. I have an accessport on the way, so I am thinking I will just go Stage I and just say screw the update...
I'd be curious to see if this helps. It seems like it should.
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Old 01-21-2012, 04:51 AM   #33
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Just to add...

My 2008 does it too. Always has, and I've never worried about it. It's honestly not something to worry about. I've always assumed that it's just the electronics hunting for the right timing and throttle plate position to reach the mapped idle speed. (At least that's how I've always thought of it.)

In the "not so old" days of carburetors and even less "old" days of drive-by-cable fuel injection, there is a mechanical "stop" to the main throttle plate where it idles. Obviously it's more complicated than that... with idle air valves and such, but point being modern day drive-by-wire cars are nothing but a remote control to the throttle. You're at the mercy of that ecu and whatever it's mapped values tell the throttle and injectors to do for the variables all the sensors are collecting at the time. Dips and inconsistencies are pretty normal. The trade off is that it doesn't die with the inconsistencies... like it would have 10 years ago. =)
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Old 01-21-2012, 11:09 PM   #34
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^^ I appreciate what you're saying. I'm just not okay with it, and fortunately there seems to be a factory fix which I've had performed. If I had to guess, there's a fix because it's not cool.

Anyway, as much as I agree with you and hate the fact that we are at the mercy of ECUs these days, at least they appear to be making 'improvements' from time to time over at Subaru Labs. If you're still running your stock tune from 2008 (or 09, 10, 11), maybe you want to see about getting them to reflash it. There have definitely been updates since then.
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Old 01-23-2012, 07:24 PM   #35
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I have this problem on my 11 - car never dies, but idle RPMs dips pretty low - and I'm running a conservative AP Stage 1 91 octane OTS map. Anybody have a simple fix? How big of a deal is the tumbler valve thing? Can you adjust it or clean it or would I have to go into the dealer?
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Old 01-24-2012, 12:50 AM   #36
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Originally Posted by jeanluconze View Post
I have this problem on my 11 - car never dies, but idle RPMs dips pretty low - and I'm running a conservative AP Stage 1 91 octane OTS map. Anybody have a simple fix? How big of a deal is the tumbler valve thing? Can you adjust it or clean it or would I have to go into the dealer?
Some guys above claim their aftermarket tunes don't have this problem. Getting a dealer reflash like I did wouldn't solve anything if you then just went back to your stage 1 AP tune.

Can't speak to a TGV related fix, personally.

I will say that my engine speed still dips initially immediately before coming to a stop, but there's no vibration in the chassis/pedals like there was before, as if the engine were choking. So the slight dip seems 'normal'. It was the shuddering that was concerning me.
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Old 01-24-2012, 06:05 AM   #37
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Quote:
Originally Posted by toolie View Post
^^ I appreciate what you're saying. I'm just not okay with it, and fortunately there seems to be a factory fix which I've had performed. If I had to guess, there's a fix because it's not cool.

Anyway, as much as I agree with you and hate the fact that we are at the mercy of ECUs these days, at least they appear to be making 'improvements' from time to time over at Subaru Labs. If you're still running your stock tune from 2008 (or 09, 10, 11), maybe you want to see about getting them to reflash it. There have definitely been updates since then.
Actually i really appreciate your post here. While i stand by my orrigial statement its good to hear there is a solution to it. Perhaps the updates would also fix my own idling woes.
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Old 02-13-2012, 04:07 PM   #38
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Last edited by donkey_cart; 12-13-2013 at 04:54 PM.
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Old 02-13-2012, 05:34 PM   #39
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my 08 wrx almost dies too. it happens when i come to my first stop when the engine is cold. it idles rough and drops pretty low. after that it is fine. its done that for 4 years now.
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Old 02-13-2012, 06:49 PM   #40
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Just an update - I flashed to Cobb Stage 1 93 octace on my 2012 WRX...still does it. I am guessing it is due to something besides the tune that Subaru did to lower emissions at idle or something....
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Old 02-13-2012, 07:14 PM   #41
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Originally Posted by donkey_cart View Post
The rough idle and surging has come back with a vengence. I will be taking it in to the dealer tomorrow. Hopefully there is a fix.

I suspect the DBW throttle is out of whack. When I am driving down the street, say at 40mph at 2000rpm in 4th gear, it will surge +/- 100rpms when at light throttle. It seems to happen most at lower RPMs with light throttle in conjunction with engine braking.

This car is a piece of ****. Just got it back after 3 weeks in the shop for 3rd gear syncros going out, plus the MPG meter. I hate to even mention all the squeeks and rattles. I should have just bought a 370z
Sorry to hear about your troubles, donkey (and others). FWIW I am protuned and have not experienced this. I believe the Lemon Law can be invoked after 3 trips to the dealer for the same issue. Maybe look into it if you're that unsatisfied with your car's performance.

Regarding the noises: my front and rear suspension has become unreasonably squeaky. Dealer inspected and said it's due to the cold weather, but mid-upper 40s is not cold . Anyone else experiencing this?? I'm sure the answer is YES and NORMAL

Cheers and good luck all.
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Old 02-13-2012, 07:34 PM   #42
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Originally Posted by 424wrx View Post
my 08 wrx almost dies too. it happens when i come to my first stop when the engine is cold. it idles rough and drops pretty low. after that it is fine. its done that for 4 years now.
Some 08 WRX use the the red tumbler valve to intake manifold gaskets. If you have the red tabs sticking out of your intake manifold, they are probably leaking. Very common problem on the 07-09 Legacy GT.

See this thread: http://forums.nasioc.com/forums/show....php?t=2299482
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Old 02-13-2012, 07:58 PM   #43
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Some 08 WRX use the the red tumbler valve to intake manifold gaskets. If you have the red tabs sticking out of your intake manifold, they are probably leaking. Very common problem on the 07-09 Legacy GT.

See this thread: http://forums.nasioc.com/forums/show....php?t=2299482
ive seen that posted before. would the issue be a warranty job for me? i have tho gold plus warranty for 7/70k. my dealer knows about my mods, vf52 swap etc. they are cool with it.
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Old 02-13-2012, 08:01 PM   #44
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Try an ECU reset to see if it goes away after?

I've noticed it too, 2012 WRX w/ Cobb stage1 OTS here, I just give the gas a little nudge out of habit now and no issues.
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Old 02-14-2012, 12:51 PM   #45
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Last edited by donkey_cart; 12-13-2013 at 04:54 PM.
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Old 02-14-2012, 01:03 PM   #46
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I personally think its the tune on the stock ECU. I used to worry about this also and I hate the stock tune on these cars. So I took my 2011 STi in to get tuned at AMS. The problem is still there but no where as bad. The lowest I've seen it drop down to was 600-700 rpm from 800-900rpm at idle.
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Old 02-15-2012, 06:46 AM   #47
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I've only noticed something like this with my 2011 wrx when I'm backing up my driveway and just let off the gas and engine brake then put the clutch in, shift to neutral and stop... it bogs a little and then shoots back up. As for the stalling issue from backing out of parking spots mentioned earlier, I've had that happen to me 2 or 3 times but it was definitely from the hill assist thinking I was rolling back because slipping the clutch where it would normally grip it would just hold and then it released and jolted forward. I've learned to deal with that from backing out of parking spots at work everyday. Although I like hill assist for what its purpose is for, the time it holds the brakes needs to be cut in half.
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Old 03-07-2012, 03:11 PM   #48
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http://forums.nasioc.com/forums/show...highlight=2008

Hope this helps, helped with my 08, if not you may have a better idea of whatís going on. Also, for Sheets and giggles, my friend pulled his OEM recirc hose off of his Diverter valve, seemed as though these symptoms INCREASED to almost every time he stops. Just saying, might help with diagnosis.
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Old 04-17-2012, 01:06 PM   #49
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Any updates on this issue? My 2011 does the same thing, the idle will dip when backing out of parking spot and every once in a while in bumper to bumper traffic.

Did the reflash help?

Thanks,

Jeff
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Old 04-17-2012, 06:08 PM   #50
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I have had this same exact thing on my bone stock 08 wrx. Push in the clutch coming to a stop and rpms dip almost to zero, but have NEVER stalled the car out. It seems to happen when its cold, since its been warming back up I haven't noticed it. I actually started a thread on this exact same thing a while back and got little to no response.

The tgv sounds like a good thought. I can't understand why you would have to replace the whole tgv though. I'm going to do a tgv delete here in the near future and if this symptom is being caused by the tumbler, I can't imagine why a delete wouldn't remedy it.
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