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Old 04-13-2013, 03:47 PM   #1
WRXlove0311
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Default Cant find anything in the threads and i have a problem

Hello, I am new here and have been searching threads to find the exact thjng as mine and only found similar things. I have an 09 wrx. Its stock with spt catback. I ordered a cobb accessport and tuned it to stage one. The car ran fine. Eventually, and im not sure when, i noticed it wasnt as fast as normal. And it began to sputter or jerk. I unmarried the ap and put on stock tune. Now there is a whistle that comes with the turbo's natural whine. Sometimes its louder than the turbo and i cant hear the turbo hardly. The car doesnt pull as hard as it used to and it jerks some when accelerating. I think its a boost leak somewhere but not sure what. Subaru said theres nothing wrong with it but I, the driver and owner know it isnt as i bought it just a few weeks ago. Its like the turbo isnt hardly there
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Old 04-13-2013, 04:36 PM   #2
RoadKillDMD
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Check out your TMIC-throttle body coupler. There are end caps on the coupler that are prone to fail, especially once you turn the boost up (for example, flashing to stage 1). Take these end caps off, reinstall the coupler, and .
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Old 04-13-2013, 04:38 PM   #3
Raidenking
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Throttle body to IC hose is loose?
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Old 04-13-2013, 06:49 PM   #4
WRXlove0311
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Well i looked up where that throttlebody to ic hose connection is and i can only reach the hose to IC and it isnt loose. I dont have tools and wouldnt want to remove anything since im just getting into all this. But yeah i dunno, looks a little dry and maybe has dry rot cracks. Its wierd tho cuz I get like no boost thru third gear. I measured the boost on my ap and it gave me 7 psi and dropped to 6 then 7,8. Lol, the boost should have been higher. It wasnt WOT tho but still. 7? Lol. Could a wastegate problem be likely? Ill look more into throttle body to ic hose.
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Old 04-13-2013, 08:36 PM   #5
RoadKillDMD
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Old 04-13-2013, 10:15 PM   #6
WRXlove0311
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I read it and it seems alot of people have that problem. Not sure if thats what I have. I cant see where the hose connects to the TB tho. The dealer said nothing was wrong but its obvious there is. What can I say to get them to find the problem? can they do any smoke type tests? also, mine doesnt make any turkey type noises.
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Old 04-14-2013, 10:29 AM   #7
WRXlove0311
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I looked at the throttle body coupler and it doesnt look disconnected. I noticed theres a metal marker or stopper on the throttle body that lets you know if the piping is pushed all the way up and its to that mark. Again tho, i havent dis assembled any thing to further inspect. Its just from what i can see thru an opening under the intake manifold. Any other ideas?
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Old 04-14-2013, 10:43 AM   #8
2004ImpressYa
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If the sound is similar to what is found in the video that Roadkill posted trying scoping out your BPV. After I installed the downpipe on my WRX I lost one of the bolts to my BPV (since I disconnected intercooler to gain better access). While I drove to autozone to grab an appropriate bolt I had that whistle/whine after about 4-5 psi of boost. Once I readjusted the BPV and the missing bolt was replaced the sound was gone. Not saying your missing a bolt but maybe its not tight or gasket is leaking???

The following is an image found on the internet and I noted where BPV is:


Last edited by 2004ImpressYa; 04-14-2013 at 10:44 AM. Reason: Photo
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Old 04-14-2013, 11:23 AM   #9
WRXlove0311
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Its not like a flutter like in the video roadkill posted. And its not as loud. The turbo got quite and this sound is there now almost as if it were the turbo but it cant be. Its almost like the turbo makes a different noise. Its like a light, higher pitch whistle. But sometimes i hear the turbo too. And my car is slower. And you basically cant feel the boost come on, sometimes its stronger than others but its never abrupt. I tried taking a video today to record sound but its so light and faint that the exhaust and engine over take it.
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Old 04-14-2013, 11:25 AM   #10
WRXlove0311
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What are the faults that can happen with a bpv other than leaky gasket seal?
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Old 04-14-2013, 05:47 PM   #11
2004ImpressYa
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Quote:
Originally Posted by WRXlove0311 View Post
Its not like a flutter like in the video roadkill posted. And its not as loud. The turbo got quite and this sound is there now almost as if it were the turbo but it cant be. Its almost like the turbo makes a different noise. Its like a light, higher pitch whistle. But sometimes i hear the turbo too. And my car is slower. And you basically cant feel the boost come on, sometimes its stronger than others but its never abrupt. I tried taking a video today to record sound but its so light and faint that the exhaust and engine over take it.

Im not a mechanic Im just provding info as far as my gathering of information. Maybe its a wastegate issue? Stuck open or slightly open possibly why your not building boost. Have you tried a boost leak test?
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Old 04-14-2013, 07:18 PM   #12
WRXlove0311
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I havent yet because Subaru said they didnt find a reason to. But I know the car isnt right so Im gonna take it to a performance shop locally unless Subaru can do the testing and find the problem. Because I have a warranty. But they seem so lost its like I almost dont want to turn my car in for another day and a half just to have them say its nothing again. But I think I realized my exhaust doesnt seem as loud as before. so maybe since the boost isn't working right there isnt alot of pressure or back pressure that would make it louder? but anyways thats another symptom of it if that helps at all
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Old 04-14-2013, 08:41 PM   #13
ryansx
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Quote:
Originally Posted by RoadKillDMD View Post
Check out your TMIC-throttle body coupler. There are end caps on the coupler that are prone to fail, especially once you turn the boost up (for example, flashing to stage 1). Take these end caps off, reinstall the coupler, and .
Do this, go drive it. Just because it looks/feels tight doesn't mean it is. If that doesn't fix it then go spend money having someone figure it out.
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Old 04-14-2013, 10:58 PM   #14
WRXlove0311
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How do I take off the endcaps? Is it rubber that I need to cut and whats the prefered way from experienced owners? Also I may have to spend money to have someone figure it out but Im trying to get an idea of what to check first because both subaru and the performance shop are asking what I want to check and specifics. Lol As if they never went through this before. Thanks for taking a minute and posting on this thread guys!
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