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05 2.0 tdi juddering

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by stu_m, Jul 10, 2013.

  1. stu_m
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    stu_m Well-Known Member VCDS Map User

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    [Jul 10, 2013]
    hey guys

    I have popped over from the B6 side to pick your brains

    My brother has an 05 2.0tdi 140 avant that has developed a problem

    it keeps juddering as if its misfiring! it does it a little at idle and it mainly does it when sitting between 1800 and 2000 rpm and accelerating through that rev range

    also it keeps going in to limp home mode if he boots it or when getting to near 80 mph which I think is overboost from sticking turbo vanes

    the turbo is a recent thing and I don't think its related

    anyone got any ideas?

    I am having a nosey at the weekend I have already had it on VCDS and all the injectors seem fine!

    Stu
    #1
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  3. lukey baby
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    lukey baby Member

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    [Jul 11, 2013]
    Engine mounts possibly?
    #2
  4. Noddy786
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    Noddy786 Member

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    [Jul 11, 2013]
    i had this same problem on my 2.0tdi but it was only a very hard judder at idle...had my egr valve cleaned out and it solved the problem but i can slowly feel the judder coming back...
    #3
  5. stu_m
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    stu_m Well-Known Member VCDS Map User

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    [Jul 11, 2013]
    Thanks for the replies

    It's not engine mounts as I say it's like it's a misfire and does it at a steady throttle too

    Egr has been cleaned too as that was my first thought
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  6. hubbo1
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    hubbo1 Member

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    [Jul 11, 2013]
    try replacing the vacuum actuator on the inlet manifold, it has a rubber diaphragm that is prone to splitting, this cured mine.
    you can also clean the swirl flaps in the inlet manifold while you have got it off.
    #5
  7. stu_m
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    stu_m Well-Known Member VCDS Map User

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    [Jul 11, 2013]
    thats twice I have heard that now!

    where is this actuator located and is there a way to test it? would clamping the vac pipe on it confirm whether it is that or not
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  8. hubbo1
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    hubbo1 Member

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    [Jul 11, 2013]
    it is at the front of the engine on the inlet manifold, black plastic with small black vac pipe.
    you should be able to test it with a vacuum tester/brake bleeder kit
    #7
  9. mm707
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    mm707 Member

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    [Jul 11, 2013]
    Here is a pic of actuator. Cost about £10 from TPS and another £10 if you want to replace the gasgets. Easy to do. You will need a couple of cans of choke cleaner too for the inlet manifold flaps. Cured mine of hesitation at around 1800rpm and limp mode fault code 299.

    Part number is S03G129061C vac.jpg
    #8
  10. hubbo1
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    hubbo1 Member

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    [Jul 11, 2013]
    hi
    I got my actuator from audi £11.94 p/n A03G 129 061 C
    #9
  11. stu_m
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    stu_m Well-Known Member VCDS Map User

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  12. stu_m
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    stu_m Well-Known Member VCDS Map User

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    [Jul 12, 2013]
    Well I had a little nosey today and this car does not have this valve!
    #11
  13. hubbo1
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    hubbo1 Member

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    [Jul 12, 2013]
    is the engine code blb? if so it will have this actuator, I will try and post a photo of the location
    #12
  14. stu_m
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    stu_m Well-Known Member VCDS Map User

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    [Jul 12, 2013]
    Not sure on the engine code I will find out tomorrow

    Looking at the pic above its to the left of the alternator next to the cam belt cover
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  15. hubbo1
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    hubbo1 Member

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    [Jul 12, 2013]
    as you look into the engine it is just off centre to the right it is attached to the manifold
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  16. stu_m
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    stu_m Well-Known Member VCDS Map User

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    [Jul 12, 2013]
    Nope definitely not there

    Wonder if some have it and some don't
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  17. mm707
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    mm707 Member

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    [Jul 12, 2013]
    Mine is a 2007 so maybe it wasn't on the 2005 ?

    Have you checked the air filter ?, I read on another forum of someone having similar problems and it turns out his air filter was really clogged up - he changed it and fixed the problem.
    #16
  18. stu_m
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    stu_m Well-Known Member VCDS Map User

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    [Jul 12, 2013]
    Yeah it's been changed along with the fuel filter too

    I took the car for a drive today and no juddering at all yet it was doing it for my brother on the way home from work

    Its going to get stripped tomorrow to check vac lines etc
    #17
  19. hubbo1
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    hubbo1 Member

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    [Jul 12, 2013]
    mine is a 2005 140 tdi-strange yours hasn't got one
    #18
  20. ukdan
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    ukdan Member

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    [Jul 13, 2013]
    Had a look at mine today and I can't see one either.
    2005 BLB.
    #19
  21. stu_m
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    stu_m Well-Known Member VCDS Map User

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    [Jul 13, 2013]
    I'm pretty sure this engine is a BLB too

    Its not my car so can't check at the min
    #20
  22. hubbo1
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    hubbo1 Member

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    [Jul 13, 2013]
    [​IMG][​IMG] this is what is on my 2005 blb 2.0 tdi 140
    Last edited by a moderator: Aug 20, 2014
    #21
  23. onearm35
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    onearm35 New Member

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    [Jul 13, 2013]
    how hard is it to change the actuator as mine is playing up at 1800rpm at low speed thanks
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  24. hubbo1
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    hubbo1 Member

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    [Jul 13, 2013]
    not too hard, egr valve has to come off then the inlet manifold, took me a couple of hours.
    #23
  25. ifsot
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    ifsot New Member

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    [Jul 28, 2013]
    mines a 54 plate 2.0 tdi blb and mine does not have one too
    #24
  26. .Jas.
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    .Jas. Member

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    [Jul 28, 2013]
    When you checked the injectors on VCDS did you do output tests while the car was running?
    #25

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