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Old 10-19-2012, 08:02 AM   #51
RuinerXL
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So, a couple of nights ago, I was able to spend some time working on the car again. I managed the get the stock hose completely off, however I could not fit the Gimmick hose for the life of me. I ended up refitting the stock hose, which showed no cracks or tears at all. I did remove the plastic endcaps, and tightened the crap out of the clamps.

In any case, the noise persists. I also noticed a fair amount of white smoke coming from the exhaust yesterday at idle, and so have reached a sort of tipping point with the car. I have another thread here detailing issues the car has been having with knock. I'm planning to pull all the mods off the car ASAP and go back to stock--something I feared I would end up needing to do eventually anyway.

It has been fun (not really), but I'm afraid I will need to use the warranty sooner or later and it's not likely to be honored with the parts I currently have on the car.
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Old 10-23-2012, 09:24 PM   #52
motown
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Took intercooler off and hose practically fell off of tb. The rubber end cap thingy was like kind of collapsed. Will post pics later.
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Old 10-23-2012, 11:25 PM   #53
bacalhau16
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Gotta be the most common problem at this point. Such a stupid coupling. Makes no sense.
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Old 10-30-2012, 12:43 AM   #54
limitwrx
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Quote:
Originally Posted by motown View Post
Took intercooler off and hose practically fell off of tb. The rubber end cap thingy was like kind of collapsed. Will post pics later.
How difficult was it to remove the IC ? I was thinking of giving it a try.

I cant seem to find any guides on the removal for the 2011's +.
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Old 10-30-2012, 10:35 AM   #55
redline23
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Quote:
Originally Posted by limitwrx

How difficult was it to remove the IC ? I was thinking of giving it a try.

I cant seem to find any guides on the removal for the 2011's +.
I took off the intercooler on my 2012 before. It wasn't hard to get off, getting it back on was more interesting with making sure you fit that annoying hose back in properly.
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Old 10-30-2012, 11:04 AM   #56
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Quote:
Originally Posted by limitwrx View Post
How difficult was it to remove the IC ? I was thinking of giving it a try.

I cant seem to find any guides on the removal for the 2011's +.
The 2011 is no different then 08+ it is very easy to remove. There are 2 screws on the turbo flange and a hose clamp on the the throttle body hose on the other side. Also you will need to take out the support screw that holds it in place in the upper driverside corner. Then take of the two hoses on the bpv and your done its off.
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Old 10-31-2012, 02:43 PM   #57
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I started having this issue today. Cobb dp & ots Stage 2 map.
I'll check the ic tb hose this afternoon & report back.
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Old 10-31-2012, 07:27 PM   #58
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That's exactly what it was. Took off ic, removed plastic ends, and the sound is gone.
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Old 11-02-2012, 02:41 AM   #59
latajacyholender
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I took the IC to TB hose off few days ago and swapped rubber caps from one end to the other since the one by the TB was damaged and its against the air stream(the inner part)- it helped for one day, and the loss of boost came again.
today i was thinking of gluing those rubber end caps to the hose but i am afraid of getting debris into the engine when the glue dries out or something.

well, I registered today at NASIOC and i guess i will try clamping the hose on without those rubber caps.

Can you tell me how the hose should be situated once back on? the red dot should be on TB side and on the top? i think last time i put it on i didnt do greatest job since now i see some chafing marks on it.
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Old 11-02-2012, 03:58 AM   #60
MaddMax
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My stock 12 WRX does not appear to be suffering from this issue (yet), I can see how it could cause problems with the cap becoming loose or torn. It is odd that Subaru went with a three peice design rather than a one piece especially with how confined the hose is. Less parts, less things to fail.

My question is how would this rubber "cap", on the throttle body side, be able to become folded in on its self since a majority of the inner portion of the cap should be sandwiched between the hose and the wide sealing lip of the throttle body housing, hence keeping it out of the path of airflow and not folding in. Now if the hose and/or cap started to pull away from the throttle body lip, then I guess I could see the exposed inner portion of the cap get caught in the air stream and start to fold in and impede air flow.

Am I missing something?
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Old 11-02-2012, 08:28 PM   #61
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I had the same thoughts. I don't think it flops over/collapses, I think it does that when it is pulled off of the tb. In my case, the tb end of the hose just pulled right off. There is not much wiggle room between the tb & ic. It won't come off, it's almost like the clamps just hold the boost in.
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Old 11-04-2012, 07:21 AM   #62
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I shot the video in the OP's post. Roughly half-throttle on the run up from 3k to 4k as shown.

So far my entire intake tract from airbox to TB, with the exception of the turbo, has been pulled off the car, inspected and re-installed by the dealership twice. The second time they did this, the BPV and associated gasket was replaced as was the IC -> TB hose and various hose clamps. Car still whistles.

The dealer still has an open ticket on the issue with Subaru TechNet, however no updates since the video was shot despite the ticket still being open.

The car is still completely stock and now has 4200 miles on it.

Not turning my own wrench on the thing at least until I get some sort of written response from TechNet or the dealership on the issue.
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Old 11-21-2012, 03:13 PM   #63
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I have this exact same problem, but I am stage 2 + TMIC. I checked all connections, and everything is tight. The data logs are clean & it makes over 18 psi boost.

Reinstalling the stock intake didnt help; aftermarket bov didnt help. I suspect it may be the wastegate, but so far Im at a loss.
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Old 11-23-2012, 04:41 PM   #64
hardlysdwz
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I decided to inspect as well today. I am getting the exact same faint whistling as displayed in some of the videos. I removed the intercooler and examined the hose, but it looked pristine. No damage on it, so I installed everything, tightened it up and I still have the exact same issue.
Could be waste gate flutter, but wouldn't that only occur when I step off the throttle? This sound defiantly only occurs at full throttle in 3rd gear or higher.

anyone pinpoint anything yet?

TP stage 1 2012 wrx hitting boost targets.
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Old 11-23-2012, 06:03 PM   #65
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Sounds identical to my problem as well. I changed the tb to ic hose and am going to change my bpv soon too. I dunno wat it is. Im puzzled
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Old 11-27-2012, 11:38 PM   #66
badams118
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I hairsprayed & torqued down all four of the TMIC hose clamps today, but still have the same problem. If I tune boost down to no more than 15 psi, the whistle is gone, but that is no long term solution.

I'll try tightening the BOV down & see if that helps. I may also try some gasket sealer where the turbo outlet mates with the TMIC hose.
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Old 11-28-2012, 08:41 AM   #67
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Quote:
Originally Posted by badams118 View Post
I hairsprayed & torqued down all four of the TMIC hose clamps today, but still have the same problem. If I tune boost down to no more than 15 psi, the whistle is gone, but that is no long term solution.

I'll try tightening the BOV down & see if that helps. I may also try some gasket sealer where the turbo outlet mates with the TMIC hose.
Keep us posted
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Old 11-28-2012, 03:14 PM   #68
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I have the same issue. I'm replacing the TMIC with Process west, replacing the tb-ic hose. I have done clamps on all vaccum lines, I'm hitting target boost and this only happens in 3-5 gear on my 2012 WRX. I am stage 3 right now. Logs are clean and look good. If I still have it after checking all boost related hoses ect and checking the DP gasket I'm going with it is the wastegate. I will report back.
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Old 11-28-2012, 11:15 PM   #69
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I have had a simalar issue in my 07 sti it's like a screeching/ whistle noise if that even makes sense, but only in WOT in 1st and 2nd. It doesnt do this all the time, only when I have been driving it normal then go WOT all the sudden, I have tried to tightened all hoses but it still does this some times!!!
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Old 11-29-2012, 01:37 PM   #70
scapone4
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Sounds like a common problem right now with same steps being unsuccessful
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Old 12-01-2012, 03:09 PM   #71
badams118
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Well, tightening down the BOV to TMIC didn't help...
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Old 12-01-2012, 05:14 PM   #72
OxCitywrx09
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I had a whistling sound as well and here is what I did to fix it.

http://forums.nasioc.com/forums/show....php?t=2435584

The stock coupler of mine looked okay as well. Despite the fact that it looked okay, I still went ahead and bought a silicone replacement. AVO coupler is rumored to be shorter than stock, Tomioka is a lot longer, and I read a few bad reviews on the gimmick hose.
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Old 12-02-2012, 10:12 AM   #73
nate_fisher
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I have the gimmick hose its a bit longer but not bad and once t- bolted its easy to move it around even with my hard fitting perrin tmic.
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Old 12-11-2012, 10:41 AM   #74
stanrc
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I had a whistling sound in mine so I took off the TMIC and found the culprit:



I took both endtanks off and put the TMIC back on (took a few tries to get it tight enough not to slide off the throttle body) but I think now its all back to normal.
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Old 12-16-2012, 05:59 PM   #75
ScoobyTed
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I had the same whistle. Took the intercooler off, grabbed the throttle body to intercooler hose and it fell off. Wasn't even remotely tight... So i took those end cap thingys off, tightened everything back down.

Re-installed the bypass valve, and I don't exactly remember how the vacuum line runs for the valve. Any input? Under the intercooler, and it has a clip to hold it to another hose? I think I have it right, but I dont remember if it just sits under the intercooler like that?

Thanks for the help...

Ted
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