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Old 05-16-2012, 04:45 PM   #1
FISH22
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Default Had ECU updated at dealership(2012 STi)

Took our car in to get the alignment checked out. Had a pull since new, so they fixed that.

While talking to the service rep, I brought up the whole "ring land" thing, and asked if Subaru had any updates for the ECU. He did a search, and said that there's an update for the ECU, which I think fell under the "misfire on 3 & 4", possibly related to the ring land issue. So they went ahead and did it. Took about 15 minutes. I obviously didn't need it, considering the car is running fine and there is no CEL. Car has about 500 miles on it. But they said it wouldn't hurt to update the ECU.

Just thought I would put this out there. I doubt this is the fix for the ring land issue, but I guess Subaru is attempting to correct something? Any thoughts?

From my receipt:

Cars current CID was AE5K611V
Eligible for update
Updated program: New CID is AE5K700V
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Old 05-16-2012, 05:00 PM   #2
teiva-boy
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Until someone compares the two maps with a ROM editor, no one will know. We have engine management forums for that....
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Old 05-16-2012, 07:16 PM   #3
bacalhau16
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Yea, its just going to take some time till we find out what exactly they are looking into. Do you feel as though your car drives any differently? Smoother powerband or anything?
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Old 05-16-2012, 07:53 PM   #4
FISH22
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I swear it feels like the car idles smoother, and the RPMs climb smoother. But I'm not sure, it could all be in my head.
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Old 05-16-2012, 08:08 PM   #5
Unabomber
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The ring land issue was fixed like 200 years ago so whatever they did had ZERO to do with that. You must have went to Perry and you needs to get in the MAIC forum and hang out with locals.

<-------------king of VA Beach Subaru dorks
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Old 05-16-2012, 08:42 PM   #6
FISH22
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Quote:
Originally Posted by Unabomber View Post
The ring land issue was fixed like 200 years ago so whatever they did had ZERO to do with that. You must have went to Perry and you needs to get in the MAIC forum and hang out with locals.

<-------------king of VA Beach Subaru dorks
Haha, yep, went to Perry. They seemed like pretty cool people to deal with.
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Old 05-24-2012, 10:50 AM   #7
going4speed
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First I've heard that they fixed the ring land issue.
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Old 05-24-2012, 11:37 AM   #8
mejifair
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Hey - I threw a CEL yesterday and brought it in this morning. It was a misfire and they upgraded the ECM.
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Old 05-24-2012, 09:50 PM   #9
gavinn58
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Quote:
Originally Posted by teiva-boy View Post
Until someone compares the two maps with a ROM editor, no one will know. We have engine management forums for that....
This...I'm really curious as to how the 2 maps differ. I'm betting I have the old map on '11.
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Old 05-25-2012, 01:45 AM   #10
UK-Wagon
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Ive never seen a ring land fail on a totally bone stock STi..... not with my own eyes. Ive only seen it happen on Tuned cars, regardless of the mods. Changing the boost level and timing can cause ring land failures on stock pistons. If you read about one on here, chances are the OP isnt telling the whole story. Now there may be a few rogue cases, but the issue is not common with totally stock cars. You shouldnt have anything to worry about, dont let these story's scare you. The stock pistons are designed to handle what the factory tune and boost levels are. Bump those up... and ring lands fail, other issues arise = owners post on here and cry about their mistakes and blame it on Subaru.

#sorryfortellingthetruth
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Old 05-25-2012, 10:30 AM   #11
lovethebugeye
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Quote:
Originally Posted by UK-Wagon View Post
Ive never seen a ring land fail on a totally bone stock STi..... not with my own eyes. Ive only seen it happen on Tuned cars, regardless of the mods. Changing the boost level and timing can cause ring land failures on stock pistons. If you read about one on here, chances are the OP isnt telling the whole story. Now there may be a few rogue cases, but the issue is not common with totally stock cars. You shouldnt have anything to worry about, dont let these story's scare you. The stock pistons are designed to handle what the factory tune and boost levels are. Bump those up... and ring lands fail, other issues arise = owners post on here and cry about their mistakes and blame it on Subaru.

#sorryforbeingmisinformed
Fixed for accuracy.

There have been more than a small number of bone stock STi's with ringland issues going back to 07. The stock tune from then on has been absolute garbage, don't believe me, throw a stock STi on a dyno and check out the graph. Or you can do some research on this site and see what I'm talking about.

Ask any subaru tuner what they think of the stock tune on recent STi's. If there wasn't a problem with the stock tune why would Subaru of America keep releasing new flashes?
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Old 05-25-2012, 10:51 AM   #12
Slimsti
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Old 05-25-2012, 11:25 AM   #13
lovethebugeye
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^^^^^^^ Exactly what i'm talkin about. That pic makes me shudder.
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Old 05-25-2012, 11:37 AM   #14
Slimsti
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I honestly would hesitate to buy a newer STI unles it had 0 miles on it. A test drive with that tune could cause damage. Those afr's and blatant knock events are Horrid.
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Old 05-25-2012, 11:46 AM   #15
lovethebugeye
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Quote:
Originally Posted by Slimsti View Post
I honestly would hesitate to buy a newer STI unles it had 0 miles on it. A test drive with that tune could cause damage. Those afr's and blatant knock events are Horrid.
Exactly, there's a very good reason my car was on the dyno with paper plates still (bought it used but with a new motor due to said graph).
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Old 05-26-2012, 04:35 PM   #16
PowerTrip
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Plus one on this. UK wagon has obviously been living under a rock if he hasn't heard of stock STi's breaking ringlands. I personally believe it's a combination of an unsafe tune and poor manufacturing standards for the pistons.

Quote:
Originally Posted by lovethebugeye View Post
^^^^^^^ Exactly what i'm talkin about. That pic makes me shudder.
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Old 05-26-2012, 05:56 PM   #17
purplewrx
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I still feel the map is fine for the street. A 3rd gear pull on a dyno from low rpms is not great representation of how the map would act on the street. I know on my car I drive in vac 90% of the time
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Old 05-26-2012, 06:00 PM   #18
Tripintaz
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That AFR is not going to hurt anything at stock boost levels. It's terrible for optimal power though. The ring land issue was a physical issue and not a tune issue. The lines in that graph look more like the boost being lowered by the ECU than knock events. Of course its impossible to tell without seeing a corresponding data log.
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