Shudder Problem, and kind of a MAF Problem

Discussion in 'VW Mk3 Jetta, Passat TDI and other/older diesels' started by fado1986, Feb 26, 2011.

  1. fado1986

    fado1986 New Member

    Joined:
    Feb 26, 2011
    Messages:
    4
    Car:
    Vento (Jetta) 98
    Hi, Im kind of a nob to diesel engines, and Im having some problems with my Vento (Jetta) 98.
    From one day to the other, it have become very hard to start, when I decelerate the engine shudder and sometimes when I accelerate, it sometimes stays stuck at 2000 rpm, and it had lost power. Im using Biodiesel 100, it hasent been 5000 miles since I changed the diesel filter.
    I have check the IQ, and I use the hammer metod and VAG and theres no way I could make it lower than 6.9. I have check the MAF and it didnt give a lecture over 800 (the max was 738 @ 2793 RPM).
    The MAP readings are OK, I have clean the air filter, and there are some carbon deposits in the EGR but not that much. Also I have some oil leak in the CCV, and I notice oil in the intake pipes.
    Any help will be highly apreciated...
    Thanks
    login to remove this ad
  2. chittychittybangbang

    chittychittybangbang Administrator

    Joined:
    May 23, 2007
    Messages:
    22,071
    Car:
    2006 Jetta TDI
    Location:
    CT
    No injection quantity adjuster codes? It's strange that you cannot make it lower than 6.9 w/hammer method. Are you loosening the right bolts and can confirm that it moves?

    No boost leak?
  3. fado1986

    fado1986 New Member

    Joined:
    Feb 26, 2011
    Messages:
    4
    Car:
    Vento (Jetta) 98
    Im sure about the bolts, the IP cover is at the end of the round eye of the security bolt. And the boost seems to be OK, cause the MAP values are very close to each other (1795.2 spec 1927.8 actual @2961 RPM).
    Thanks
  4. chittychittybangbang

    chittychittybangbang Administrator

    Joined:
    May 23, 2007
    Messages:
    22,071
    Car:
    2006 Jetta TDI
    Location:
    CT
  5. fado1986

    fado1986 New Member

    Joined:
    Feb 26, 2011
    Messages:
    4
    Car:
    Vento (Jetta) 98
    Those exact ones, I used the guide found in this page to make the adjustments

Share This Page