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No boost. Lots of back pressure. Help

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by tdi heed, Sep 15, 2009.

  1. tdi heed
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    tdi heed New Member

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    [Sep 15, 2009]
    can any 1 help i have 1.9tdi(awx) the oil seals went last week so i sent it away 2 midland turbo where it was re-cond. i got it back yesterday put it back on now i have no boost and lots of back pressure. it never had this problem before the turbo went. the engine has only done 60.000 miles. i have also changed the oil and filter. the engine breather is also clear. can any1 help???
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  3. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Sep 16, 2009]
    Blocked cat/particulate filter would be my guess
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  4. tdi heed
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    tdi heed New Member

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    [Sep 17, 2009]
    theres boost up high in the revs but low down no response. cant explain the back pressure.
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