1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

TDi more responsive after battery disconnect and reconnect

Discussion in 'Diesel forum' started by nlldavies, Jan 19, 2006.

  1. nlldavies
    Offline

    nlldavies Member

    Joined:
    Dec 17, 2004
    Messages:
    36
    Likes Received:
    0
    [Jan 19, 2006]
    While trying to sort out a electric window/mirrors and interior light problem I decided to see if reseting the ECUs on the car by disconnecting the battery would help solve the problem.

    After reconnecting and driving the car I found it quite a lot more responsive. Any reason for this?

    Thanks
    #1
  2. Ads

    Ads

    [Nov 20, 2014]

  3. Jason
    Offline

    Jason Member

    Joined:
    Mar 7, 2005
    Messages:
    186
    Likes Received:
    0
    [Jan 20, 2006]
    Hi

    Certain A6 V6tdi I think Pre 2000 (Ours for example and I think certain A3's have this problem with uneven tick over)) have a problem with their engine management system making them noisy and slightly rough to drive with the long term solution being to go to Audi give them loads of money and get them to reprogrammed the ECU.
    Short term solution is to wait a minute after having run the car or from cold,disconnect the battery for about a minute,reconnect and the ECU which should reinstalled all running settings from factory default.
    Over time it gets noisy/rough again as the various sensors send info to the ECU which as the engine management programme is dickey advances the timing a little for example and hence the noise/less smooth!
    #2
  4. S4_dan
    Offline

    S4_dan Fire up the Quattro! VCDS Map User

    Joined:
    Jan 5, 2006
    Messages:
    1,770
    Likes Received:
    83
    [Jan 20, 2006]
    I had to disconnect the battery today (to get access down the side of battery) and now the cars appears to be LESS powerful. not hesitant or flat spots, just generally not as powerful??

    Just cleaned the MAF last week and what difference, nw suddenly all that power gain has gone! /ubbthreads/images/graemlins/confused.gif
    #3
  5. Jason
    Offline

    Jason Member

    Joined:
    Mar 7, 2005
    Messages:
    186
    Likes Received:
    0
    [Jan 20, 2006]
    Check that you haven't disturbed any of those little black plastic tubes going to your mini-vacuum pumps behind the engine on the bulk head.

    I once inadvertently disconnected one and the old V6 wouldn't rev over 2500,simply pushed it back on to it's connection and that sorted that!
    #4
  6. S4_dan
    Offline

    S4_dan Fire up the Quattro! VCDS Map User

    Joined:
    Jan 5, 2006
    Messages:
    1,770
    Likes Received:
    83
    [Jan 21, 2006]
    Checked the little pipes...all intact.

    Care felt a bit better today! hopefully its just the ecu recalibrating!
    #5

Share This Page