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2.5 TDI turbo lagging

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by Turkster, Nov 16, 2013.

  1. Turkster

    Turkster Bro.Paul 2.5TDI Quattro Sport

    Dec 11, 2007
    Likes Received:
    My poor Audi has been ill lately and cost me a small fortune getting a head restored after a valve got stuck in the closed position and through out a few followers and lifters, Carbon build up was pointed at along with a late oil change,

    Its had a new cam belt and all the other bits that go with fixing the car,

    it does seem to want a few extra cranks before it fires up, then the car runs ok but it does seem to have a delay on the Turbo kicking in, I've had a real good sniff around the sucker pipes and replaced loads of them, I've even changed the N75 valve but im still getting the same issue,

    any ideas folks ?

    N75 valve
    Audi N75 wastegate bypass regulator valve diesel engine 1K0906627A | eBay
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  3. adamss24

    adamss24 Well-Known Member

    Jul 3, 2007
    Likes Received:
    Most likely timing is out...needs a scan really.
    Turkster likes this.
  4. demus

    demus Fire in the hole..

    Sep 9, 2009
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    Does the V6 have a VNT turbo, vanes sticking would give a delay with the turbo spooling up.
    Turkster likes this.

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