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Smoke high end revs

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

  1. Spatula

    Spatula S3 8P

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    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.
     
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  3. vivalacoulter

    vivalacoulter Active Member
    VCDS Map User Gold Supporter Audi S5

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    What colour is the smoke?
     
  4. S3quatt

    S3quatt Flat Oot like a ducks Foot
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    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.
     
  5. Spatula

    Spatula S3 8P

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    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.
     
  6. s3dave

    s3dave TFSI Hybrid
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    Sounds like its throwing fuel in with black smoke...
     
  7. Spatula

    Spatula S3 8P

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    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).
     
  8. S3quatt

    S3quatt Flat Oot like a ducks Foot
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    What Dave said.
    Unburned fuel. Possibly a leaking injector...
     
  9. Spatula

    Spatula S3 8P

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    On further inspection, the smoke is actually infact blue smoke.
     
  10. Sam_

    Sam_ Down under

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    Oil. Potentially either rings, turbo seals, or your PCV system. Worth whipping the hose to the TB to see how oily it is.
     
  11. Spatula

    Spatula S3 8P

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    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?
     
  12. Alex C

    Alex C Well-Known Member
    VCDS Map User Audi S3

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    .... :uhm:
     
  13. Spatula

    Spatula S3 8P

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    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,
     
  14. Alex C

    Alex C Well-Known Member
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    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
     
  15. Spatula

    Spatula S3 8P

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    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?
     

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