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Eggy smell and engine management light

Discussion in 'A3/S3/Sportback (8P Chassis)' started by baz1, Aug 14, 2009.

  1. baz1
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    baz1 New Member

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    [Aug 14, 2009]
    Hi guys,

    got a a3 3.2 v6 dsg. Engine management light has come on, revs are bouncing around on idle and getting a strong eggy smell from engine bay!

    Any ideas?
    Last edited by a moderator: Aug 16, 2009
    #1
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  3. voorhees
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    voorhees Moderator Staff Member Moderator

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  4. baz1
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    baz1 New Member

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    [Aug 14, 2009]
    Why wud ther b an eggy smell??
    #3
  5. voorhees
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    voorhees Moderator Staff Member Moderator

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    [Aug 14, 2009]
    lack of water in the battery causing it or "The sulphur smell from the exhaust, is actually caused by running the engine/cat convertor slightly lean for long periods and then running under a rich condition (ie going up a hill under heavy load) This is when the sulphur smell (rotten egg) is produced.


    Under relatively lean conditions, the sulphur found in gasoline is converted to sulphur trioxide, then during the rich running condition the sulfur trioxide is converted into hydrogen sulphide (rotten egg smell) within the catalytic converter.


    Audi of America issued a service bulletin Group 24, #92-04 which detailed this problem. They list the cause as : the gasoline sulphur content and the characteristic of catalytic convertor to store sulphur compounds and release them during rich engine running conditions.


    Switching gasoline brands may help. The Oxygen sensor may also need to be replaced to correct a fuel injection mixture problem"
    #4
  6. voorhees
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    voorhees Moderator Staff Member Moderator

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    [Aug 14, 2009]
    or you have a flatulence problem your unaware of ?
    #5
  7. baz1
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    baz1 New Member

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    [Aug 14, 2009]
    Wats that? Thanks 4 ur help btw
    #6
  8. voorhees
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    voorhees Moderator Staff Member Moderator

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    [Aug 14, 2009]

    farting :)
    #7
  9. paddy
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    paddy Audi=No fault code, no idea

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    [Aug 14, 2009]
    I had this last week. Lumpy at tickover but fine once reving. You need to get the fault code but mine was the lambda sensor. About £200 at Audi fitterd and tested.
    #8
  10. baz1
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    baz1 New Member

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    [Aug 14, 2009]
    i'm also getting a petrol smell and a whooshing noise everytime i press the accelerator. Is this safe to drive to the garage tomorrow?
    #9
  11. edition
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    edition Active Member

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    [Aug 14, 2009]
    The battery is in the boot!
    #10
  12. paddy
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    paddy Audi=No fault code, no idea

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    [Aug 14, 2009]
    Mine smelt of petrol at tickover as well....I drove it 20 miles to audi guildford no problem...
    #11
  13. voorhees
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    voorhees Moderator Staff Member Moderator

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    [Aug 14, 2009]
    so you are saying that if you never topped it up with water the smell of sulphur would magically disappear and not enter the cabin ?
    #12
  14. paddy
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    paddy Audi=No fault code, no idea

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    [Aug 14, 2009]
    Its not likely as it has a sealed lid to its compartment and is maintanance free anyway. Cant see how this would give him a lumpy tickover either..

    at the end of the day its guess work but can he drive it saftly to a garage........well i wouldnt put my head on the block :)
    #13
  15. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Aug 14, 2009]
    It's probably a faulty coil pack, causing an overrich situation, causing the cat to spew the fumes
    #14
  16. voorhees
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    voorhees Moderator Staff Member Moderator

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    [Aug 14, 2009]
    so okay your right I'm wrong but whats saftly ;)
    #15
  17. paddy
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    paddy Audi=No fault code, no idea

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    [Aug 15, 2009]
    Saftly is a special word we use down south when we cant spell the real one :yes:
    #16
  18. baz1
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    baz1 New Member

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    [Aug 15, 2009]
    turned out to be faulty front lambda sensors. The front two. The guy at the garage quoted my £400 including fitting!!

    Is it me or is this far too expensive?
    #17
  19. paddy
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    paddy Audi=No fault code, no idea

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    [Aug 15, 2009]
    Baz
    See my post above....... number 8 !!
    #18
  20. baz1
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    baz1 New Member

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    [Aug 16, 2009]
    Was that 200 quid for both of the front lambdas?
    #19
  21. edition
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    edition Active Member

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    [Aug 16, 2009]
    they look easy enough to get to......


    How much are they each?
    #20
  22. FactionOne
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    FactionOne Administrator Staff Member Administrator

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    [Aug 16, 2009]
    [​IMG]

    Sorry, couldn't resist!

    //R
    #21
  23. voorhees
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    voorhees Moderator Staff Member Moderator

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    [Aug 16, 2009]
    Rob...your barred
    #22
  24. FactionOne
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    FactionOne Administrator Staff Member Administrator

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    [Aug 16, 2009]
    That's not very mice. There's no need to be so catty.

    But yeah, I guess I've been a little Photoshop-happy this weekend. I'll give it a rest, for now... :)

    Rob.
    #23
  25. paddy
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    paddy Audi=No fault code, no idea

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    [Aug 16, 2009]
    Baz
    My invoice was for one but it was only £74+vat...the rest (£149) was "investigation" as they put it...
    #24
  26. baz1
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    baz1 New Member

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    [Aug 30, 2009]
    which audi was that paddy?
    #25
  27. paddy
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    paddy Audi=No fault code, no idea

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    [Aug 30, 2009]
    That was for my A3, 3.2 DSG 2004.
    I used Audi Guildford.

    I just checked the invoice and the part was actually £93 but i got 15% discount because the old girl is over 4 years old ie: £79.14p.

    [​IMG]

    hope that helps...
    Last edited: Aug 30, 2009
    #26

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