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Smoke high end revs

Discussion in 'A3/S3 Forum (8L Chassis)' started by Spatula, Jul 3, 2013.

  1. Spatula
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    Spatula 1.8T AGU

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    [Jul 3, 2013]
    Hi all,

    Recently had a problem where when I give it some beans in 2nd/3rd/4th, and go over say 4000rpm, then change up, I get a cloud of smoke coming from the back, until I lift off..
    Any idea's what it could be?

    Cheers

    Edit: I should probably mention its a 1998 1.8T.
    #1
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  3. vivalacoulter
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    vivalacoulter Member

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    [Jul 3, 2013]
    What colour is the smoke?
    #2
  4. S3quatt
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    S3quatt Flat Oot like a ducks Foot

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    [Jul 3, 2013]
    Are you saying you're changing up before lifting off?

    Of do you mean you get the smoke as you lift off before changing up?

    Is the smoke white or have a blue tinge?

    I'm thinking broken or sticking piston rings, stem seals or turbo seals. Mainly blue smoke.
    #3
  5. Spatula
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    Spatula 1.8T AGU

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    [Jul 4, 2013]
    I think it's black smoke. It only happens when I get high up into rev range then change gear, say pulling off slip road onto motorway. I'll be in 3rd @4000+ rpm, change gear and get a plume of black smoke. Then for the next few seconds there's a little more black smoke then it goes away.
    #4
  6. s3dave
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    s3dave TFSI Hybrid

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    [Jul 4, 2013]
    Sounds like its throwing fuel in with black smoke...
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  7. Spatula
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    Spatula 1.8T AGU

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    [Jul 4, 2013]
    What would cause excess fuel to be pumped through, or unburned fuel? Spark plug?
    What would be the signs of a turbo going bad? Would this do that? (the turbo has no issues as far as i'm aware but a friend said it could be that).
    #6
  8. S3quatt
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    S3quatt Flat Oot like a ducks Foot

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    [Jul 4, 2013]
    What Dave said.
    Unburned fuel. Possibly a leaking injector...
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  9. Spatula
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    Spatula 1.8T AGU

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    [Jul 5, 2013]
    On further inspection, the smoke is actually infact blue smoke.
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  10. Sam_
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    Sam_ Down under

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    [Jul 5, 2013]
    Oil. Potentially either rings, turbo seals, or your PCV system. Worth whipping the hose to the TB to see how oily it is.
    #9
  11. Spatula
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    Spatula 1.8T AGU

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    [Jul 23, 2013]
    It's happened again. I got to about 4000r/pm, and then all of a sudden lost power and plumes of blue/white smoke everywhere.
    Lifted up bonnet too and, from the back of the engine (where the turbo is situated) the same colour smoke was seeping out.

    Anyone got any ideas?
    #10
  12. Alex C
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    Alex C Well-Known Member

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    [Jul 23, 2013]
    .... :uhm:
    #11
  13. Spatula
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    Spatula 1.8T AGU

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    [Jul 23, 2013]
    Lol, fair enough. Is it a hard job to get done? I guess it's a garage job at very least.
    Is there any way to make sure that's the problem? like, compression tests etc.

    Cheers,
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  14. Alex C
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    Alex C Well-Known Member

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    [Jul 23, 2013]
    Not sure how to definitely confirm it, best off speaking to Dan ( beachbuggy), he'll know

    a standard garage is likely to subcontract a job like that out to a specialist, which Dan is
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  15. Spatula
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    Spatula 1.8T AGU

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    [Jul 23, 2013]
    Okay cool. I've messaged him. I'm thinking if it IS a turbo issue, I might just replace with a KO3S.

    Why is it a bad idea to buy one of the copies?
    #14

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