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  1. #1
    Established Member Two Rings mike0819's Avatar
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    Help, lot white exhaust smoke while stop at light

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    My 3.0 tfsi supercharged engine, 90 k on clock, recently noticed every time I stop at light, there are bit noticeable smoke coming from my rear end, white smoke, the car run fine I do not notice any problems, can anyone let me know do I need check something or could be sign something going to be wrong soon?

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  2. #2
    Established Member Two Rings mike0819's Avatar
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    Quote Originally Posted by mike0819 View Post
    My 3.0 tfsi supercharged engine, 90 k on clock, recently noticed every time I stop at light, there are bit noticeable smoke coming from my rear end, white smoke, the car run fine I do not notice any problems, can anyone let me know do I need check something or could be sign something going to be wrong soon?

    Sent from my EVR-AL00 using Audizine mobile app
    My oil do get low around every 5000 k, and weather has been quit cold, but I noticed I got lot more exhaust white smoke than other cars

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  3. #3
    Established Member Two Rings
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    Is it all the time or just when the car isn't warmed up and then it goes away?

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  4. #4
    Veteran Member Four Rings Dr GP's Avatar
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    I would put the PCV valve on a short list of probable suspects.

  5. #5
    Active Member One Ring LtDangle's Avatar
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    Cat failure could be one potential issue.
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  6. #6
    Senior Member Two Rings BigKeshy's Avatar
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    Quote Originally Posted by mike0819 View Post
    My oil do get low around every 5000 k, and weather has been quit cold, but I noticed I got lot more exhaust white smoke than other cars
    I have a feeling this is water vapor in your exhaust gasses condensing it leaves the tailpipe. Does the amount of smoke go down as your car comes up to operating temperature?

    When you say more smoke than other cars, so the other cars have comparable engines? Our engine moves a lot more air than a 4-cylinder commuter car so it would make sense that you'd see more exhaust gas than your average econo-box.
    2013 B8.5 S4 MT

  7. #7
    Veteran Member Four Rings jsh139's Avatar
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    How's your coolant level? Could be leaking from one or both of the S/C intercooler cores and being burned off.

  8. #8
    Veteran Member Three Rings
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    I was thinking supercharger
    Does it only happen only after you’ve just started driving?


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  9. #9
    Established Member Two Rings dimonblr's Avatar
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    White usually means coolant. Possibly a gasket?
    2014 Audi S4

  10. #10
    Established Member Two Rings mike0819's Avatar
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    Quote Originally Posted by Dr GP View Post
    I would put the PCV valve on a short list of probable suspects.
    Is it expensive to fix? I noticed my engine oil do get low quit fast

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  11. #11
    Veteran Member Four Rings Dr GP's Avatar
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    No but you need to remove the Supercharger to get at it. If you plan on keeping the car for a while,it is prudent to also replace the t stat, water pump and coolant tube while the SC is off . Otherwise, you will need to remove the Sc again when they fail, Labor to remove the Sc is the biggest cost for the project.I had all those things done at an indy shop for $1500

  12. #12
    Established Member Four Rings Morritse's Avatar
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    Quote Originally Posted by jsh139 View Post
    How's your coolant level? Could be leaking from one or both of the S/C intercooler cores and being burned off.
    +1

    If you have no coolant loss, it's probably normal.
    If you do, it's probably PCV.
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  13. #13
    Established Member Two Rings mike0819's Avatar
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    Quote Originally Posted by Morritse View Post
    +1

    If you have no coolant loss, it's probably normal.
    If you do, it's probably PCV.
    I do notice coolant do get low a bit, I just fill it up, and add some engine oil, the problem seems go away now. By the way what happens if I leave the pcv unfixed, will it just burn out my coolant faster?

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  14. #14
    Established Member Four Rings Morritse's Avatar
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    Quote Originally Posted by mike0819 View Post
    I do notice coolant do get low a bit, I just fill it up, and add some engine oil, the problem seems go away now. By the way what happens if I leave the pcv unfixed, will it just burn out my coolant faster?

    Sent from my EVR-AL00 using Audizine mobile app
    Yea, will continue to get worse
    196.5/57 - e85 custom tune (EPL) - custom exhaust -
    ported blower - IABED TB - Brembo BBK - APR CPS - AEM Meth - USP intake- 034 sways and drivetrain inserts - cr-15 - 034 density control arms - Koni sport shocks - Eibach lowering springs - VMR v804 -PSS

  15. #15
    Established Member Two Rings KLX's Avatar
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    Quote Originally Posted by Dr GP View Post
    No but you need to remove the Supercharger to get at it. If you plan on keeping the car for a while,it is prudent to also replace the t stat, water pump and coolant tube while the SC is off . Otherwise, you will need to remove the Sc again when they fail, Labor to remove the Sc is the biggest cost for the project.I had all those things done at an indy shop for $1500
    What he said...T-stat W-pump, and coolant tubes, as well as supporting gaskets, while you have the SC off replace the gaskets under there also.
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