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boost leak

Discussion in 'A3/S3/Sportback (8P Chassis)' started by s3ollie, Apr 20, 2011.

  1. s3ollie
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    s3ollie Member

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    hi, just had my car remapped last week and it was making a whistling noise as the turbo spools from about 3-4.5 k revs.

    I thought this was the DV so changed it for the latest OEM update but the whistle is still there.

    I wondered if there was a common place for a leak to occur or has anyone had the same problem?

    Cheers

    Ollie
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  2. s3ollie
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    s3ollie Member

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    i guess its not that common then? I will investigate and see what i can find
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  3. dc240969
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    dc240969 Member

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    Do you have a cai?
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  4. s3ollie
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    s3ollie Member

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    no, just the standard air box
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  5. dc240969
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    dc240969 Member

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    if there was a leak you would be feeling it in the performance of the car. l say its normal. mines has went through a few changes with different sounds coming ot of them. but in saying that most of mine came from the cai or n75.

    Meant to add. What are you driving.
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  6. s3ollie
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    s3ollie Member

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    ive got a 56 S3 had it mapped last week and from the first drive i noticed it. it didnt make the expeceted figure on the dyno and I put it down to a boost leak because of the noise. I got the DV changed for the newest OEM one as I thought that was the likley cause as i thought it would be an early one. When I say whistle, I mean like one of those kettles would make when boiling not the woosh/suck of the turbo. does yours do that?
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  7. s3ollie
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    s3ollie Member

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    I chaned an O ring in the boost piping and tightend all the clips but its still doing it. Cant see any holes although its pretty unlikley id see it if it were a small hole.

    So unless i can find a leak (have to it pressure tested) it looks like it might be on the vacume side.

    Is anyone else running the stock airbox with a stage one map?
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  8. S.
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    maybe your PCV is failing?
    found my boost leak there.
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  9. s3ollie
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    s3ollie Member

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    Hi, just done a web search and its saying its a good idea to change the valve every 30,000 miles, mines done 40,000 so that would sound very possible.

    Where abouts would i find the PVC valve
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  10. S.
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    it will probably fail again. go for a catch tank (Forge or BSH) or for a PCV delete plate (BSH). i would recomend catch tank as you'll do something good for your engine.
    #10

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