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2.0 Tfsi Backfire Under Load

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by Spanner 1980, Aug 27, 2014.

  1. Spanner 1980
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    Spanner 1980 Member

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    [Aug 27, 2014]
    I have recently lent my a4 2.0 tfsi to the guy who works with me for a week while I went on holiday and now that I have come back it's now backfiring at about 3k rpm, anybody had this problem before? Possible dump valve issue? Thanks in advance.
    #1
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  3. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Aug 27, 2014]
    any lights ?

    hows it driving

    loss of boost etc ?
    #2
  4. Spanner 1980
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    Spanner 1980 Member

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    [Aug 27, 2014]
    Engine management light flashing, intermittent boost
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  5. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Aug 27, 2014]
    1 or more coil packs

    does it only flash when it misfires ?
    #4
  6. Spanner 1980
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    Spanner 1980 Member

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    [Aug 27, 2014]
    Yeah only when it misfires, the car is smooth as silk until it comes on boost.
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  7. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Aug 27, 2014]
    id say coil pack or packs

    its better to change all 4 at once only get oem tho some from places like euro gfs are ****
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  8. Spanner 1980
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    Spanner 1980 Member

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    [Aug 27, 2014]
    Thanks for the advice, will change them tomorrow and see how it goes.
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  9. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Aug 27, 2014]
    try to get it scanned first to be 100% sure
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