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Turbo / Boost Noise FIXED !

Discussion in 'A3/S3 Forum (8L Chassis)' started by darko, Jan 30, 2005.

  1. darko
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    darko Member

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    [Jan 30, 2005]
    after many, many weeks of trying to solve the strange sound on my car it is fixed ! the noise was like a boost leak when I was accelerating, happened in all gears with the car cold or hot - the garage had the car for a week and couldn't find it however, today i found it !

    turned out to be a hose inside the wing ! where the airbox feeds through into the wing there should be a hose or something that feeds the intake towards the front of the car - mine seems to have gone missing.

    I'll fire up the EPC later and grab a diagram to show people - I know there are quite a few people suffering with this and believe me short of taking the engine out of my car we had looked everywhere...
    #1
  2. monty77
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    monty77 Member

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    [Jan 30, 2005]
    [ QUOTE ]
    after many, many weeks of trying to solve the strange sound on my car it is fixed ! the noise was like a boost leak when I was accelerating, happened in all gears with the car cold or hot - the garage had the car for a week and couldn't find it however, today i found it !

    turned out to be a hose inside the wing ! where the airbox feeds through into the wing there should be a hose or something that feeds the intake towards the front of the car - mine seems to have gone missing.

    I'll fire up the EPC later and grab a diagram to show people - I know there are quite a few people suffering with this and believe me short of taking the engine out of my car we had looked everywhere...

    [/ QUOTE ]

    The plastic tube that connects induction box to hole in wing?

    ..sounds like someone had an aftermarket induction kit on at some point and forgot to refit.

    Adam
    #2
  3. darko
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    darko Member

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    [Jan 30, 2005]
    yeah maybe, im not sure which part it is as its not there ! I had to remove the plastic wheel arch to get access to see what was going on - basically the airbox was just open into the cavity between the wing and the wheel arch, i put some foam in there and put it all back together and no noise ! will order up the part tomorrow or maybe do the mod that people do to feed a pipe straight from the front bumper to that pipe...
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  4. Pontio
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    Pontio Member

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    [Jan 30, 2005]
    what noise where u getting darko?
    #4
  5. darko
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    darko Member

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    [Jan 30, 2005]
    the noise sounded like the turbo was in my glovebox, like the sound of air escaping - it made me think i had a split turbo hose or a dv control problem. hard to describe but basically a hissing / wooshing as the turbo was boosting
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  6. Pontio
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    Pontio Member

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    [Jan 30, 2005]
    my turbo whistels when im putting my foot down. doesnt sound like its coming from inside the car though..
    Do you think its anything to be worried about or normal? i have never owned a turbo before so its all new to me..
    #6
  7. monty77
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    monty77 Member

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    [Jan 30, 2005]
    [ QUOTE ]
    yeah maybe, im not sure which part it is as its not there ! I had to remove the plastic wheel arch to get access to see what was going on - basically the airbox was just open into the cavity between the wing and the wheel arch, i put some foam in there and put it all back together and no noise ! will order up the part tomorrow or maybe do the mod that people do to feed a pipe straight from the front bumper to that pipe...

    [/ QUOTE ]

    Yup, sounds like it. Plastic pipe thingy, can imagine induction noise would be a lot louder without it!

    Def worth having though, engine bays on these cars get hot so a decent cold feed is important.

    Adam
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  8. darko
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    darko Member

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    [Jan 30, 2005]
    all turbo cars whistle a bit, mine (S3) was crazy though - you could hear it over the radio ! I can proudly say I have always owned turbo cars so i knew it wasnt right.. i can now hear the turbo but only just, a distant whistle like it should be - you wouldnt notice it unless you were listening out for it
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  9. nervus
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    nervus Well-Known Member

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    [Jan 31, 2005]
    I have the same noise, changed the hoses, DV etc and there is no boost leak just a wierd noise (not turbo) ill have to check that out. Mine sounds like someone blowing over the top of an empty bottle!
    #9
  10. benk
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    benk Member

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    [Jan 31, 2005]
    nervus - I have definitely heard people describe something in exactly the same way "blowing over a bottle" but can't remember what their problem was...
    I think it may have been DV related, but one person mentioned that it was their exhaust and it had a split in it.
    Might be worth a search on "bottle" and "blowing" through forums
    #10
  11. monty77
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    [Jan 31, 2005]
    [ QUOTE ]
    I have the same noise, changed the hoses, DV etc and there is no boost leak just a wierd noise (not turbo) ill have to check that out. Mine sounds like someone blowing over the top of an empty bottle!

    [/ QUOTE ]

    Knackered DVs can make 'moo' noises ... anything like that?

    A
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  12. nervus
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    nervus Well-Known Member

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    [Jan 31, 2005]
    Ill try a search. Its definately not the DV as it still the smae with the forge DV and new bosch one. It only does it in a high gear low revs say 6th at 50mph.

    The noise fades as the car accelarates then dissapears with a hiss around 4.5 - 5K revs!

    It doesnt occur if im in the right gear for maximum accelaration
    #12

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