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Turbo problem's or Mass Air Meter?

MrFluffyBunny Jan 12, 2005

  1. MrFluffyBunny

    MrFluffyBunny New Member

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    Hi all, I'm experiencing problems with my 2.5 TDi A6. Car loses power above 3K rpm, feel's like I don't have a turbo anymore. I've put a Snap On diagnostic M/C on it and have no fault codes. I've swapped my Air Box top (Mass Air Meter I believe) with my Father In Law's motor and had no difference. Only thing I can find is that barometric pressure in the inlet manifold peaked at 1,499 milibars, I believe this should be around 2000 milibars. To me this point's me towards my turbo charger however I'm loath to pay out for a new turbo without being certain that there is a turbo fault. I had a look at my turbine and it spins freely with no end float so all should be ok unless there is a problem with the waste gate.

    Has anybody had similar problems?

    Do you have any suggestions on where to obtain information or how to pin down a diagnostic?
     
  2. bravepilot

    bravepilot Member

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    Wow... impressive terminology... I don't understand a word of it though, perhaps you have just got some of your fluff stuck in your turbo Mr Bunny? /ubbthreads/images/graemlins/lol.gif

    [eratum: apologies for the bad joke... I'm having an off day]
     
  3. leespears1

    leespears1 Member

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  4. the MAF has a plug coming out of it, its not actually attached too the airbox, only by a jubilee clip.
    is yours the di or cr version?
     
  5. motofox

    motofox New Member

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    Mines a 1995 2.5 a6 tdi and i got the same problem - it used to boost from 2500 to 4500 rpm, but now theres no boost and just revs slugish, im trying to locate the boost valve regulator and wastgate to investigate them .
     
  6. Rev-head

    Rev-head Active Member

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    http://forums.tdiclub.com/showthread.php?t=60705

    This is the b all of all knowledge when it comes to TDI engines ...i have just spent the last 2 hours reading a mass of information recomend it to all owners of TDI motors

    /ubbthreads/images/graemlins/beerchug.gif
     
  7. motofox

    motofox New Member

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    that link is invalid, but i know the site
     
  8. Rev-head

    Rev-head Active Member

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  9. Rev-head

    Rev-head Active Member

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    [ QUOTE ]
    Wow... impressive terminology... I don't understand a word of it though, perhaps you have just got some of your fluff stuck in your turbo Mr Bunny? /ubbthreads/images/graemlins/lol.gif

    [eratum: apologies for the bad joke... I'm having an off day]

    [/ QUOTE ]



    Fluff stuck in your turbo do you work for Kwik fit............... /ubbthreads/images/graemlins/laugh_roll.gif /ubbthreads/images/graemlins/laugh_roll.gif
     
  10. VAGMAN1

    VAGMAN1 Member

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    sounds like the problems I'm having with my A3 1.9TDI 110 - the turbo has vaes have caked up with a mixture of soot/oil (leaking from the 'wet side' of the turbo due to bearing wear) - the vanes stick open causing over-boost, which results in the ECU shutting the turbo down. However I had a fault code.

    Save yourself time and worry and just get your local dealer to carry out a full diagnostic - they can work all components of the turbo system and diagnose the fault.

    If you want more help send me a message!
     

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