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a4 99 2.5 tdi over boosting

Discussion in 'Diesel forum' started by dive007, Sep 3, 2006.

?

help

  1. is it an easy strip & clean

    50.0%
  2. are there any upgrade for the turbo

    75.0%
Multiple votes are allowed.
  1. dive007
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    dive007 New Member

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    [Sep 3, 2006]
    have been informed by star perforance that turbo is sticking and over boosting how easy to strip vnt turbo and clean
    or
    can i upgrade turbo and fit the chip i have got and take out the cat
    any info
    #1
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  3. Defratos
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    Defratos You’re Dethpicable!!

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    [Sep 3, 2006]
    I don't get it :uhm:
    #2
  4. Rev-head
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    Rev-head Active Member

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    [Sep 3, 2006]
    Need to be a bit more clearer with info.......Turbo Sticking are you sure they said that ..sure it was not the EGR Valve sticking.........Could you explain fault a little more and you might get a better idea of a solution for it

    Cheers
    #3
  5. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Sep 3, 2006]
    Wastegate sticking maybe??
    #4
  6. dummi
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    dummi smoking a6

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    [Sep 3, 2006]
    if it is waste gate actuator just remove the old one and replace it , it is externally mounted and functioning on the turbo (not sure what space is like on your model you may be able to reach it if you have small hands..), relatively easy to do than taking the turbo off straight away. if this cures it your done. if it is the wastegate sticking that will be internal to the exhaust housing of the turbo , this is a turbo off job.
    #5
  7. dive007
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    dive007 New Member

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    [Sep 3, 2006]
    they said cleary that the turbo was stick and over boosting then going into limp home mode not easy when your comeing of a round about going up hill towing a caravan after a minute restart and speed crept up they and quoted £ 700+vat fitted
    #6
  8. kris_tdi
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    kris_tdi Member

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    [Sep 4, 2006]
    if its over boosting it will probably be a sensor. the 2.5 tdi does not have a wastegate. the boost is controlled by varing the veins via the ecu. if the turbo was sticking you wouldnt be going anywhere.
    #7
  9. K7ERG
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    K7ERG Member

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    [Oct 8, 2006]
    If turbo sticking it will probably be the bearings on the shaft that have failed causing the compressor wheels to jam on the turbo housing.
    #8
  10. VAGMAN1
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    VAGMAN1 Member

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    [Nov 13, 2006]
    this happened on my A3 1.9 TDI. basically the bearings wear on the turbo, causing shaft wobble, causing oil to mist out past the seals - this oil then mixes forms a paste which then sticks the VNT veins (normally when they open fully) - hence ECU senses overboost and puts the car into limp mode. switching ignition off clears the fault code and resets > everything is fine until it happens again..........

    I got my turbo refurbished and did all the work myself - £350 versus £950 Audi dealer quoted!
    #9
  11. Jason
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    Jason Member

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    [Nov 14, 2006]
    Classic known problem on this age and model of vehicle!
    #10

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