Volks AutosAH Fabrications
Results 1 to 5 of 5
  1. #1
    Neutral

    Status
    Offline
    Join Date
    Dec 2004
    Location
    UK
    Posts
    36

    TDi more responsive after battery disconnect and reconnect

    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

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    Jason's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Mar 2005
    Location
    France
    Posts
    186

    Re: TDi more responsive after battery disconnect and reconnect

    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!

  4. #3
    S4_dan's Avatar
    Fire up the Quattro!

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Somewhere in the Howardian Hills!
    Posts
    1,504

    Re: TDi more responsive after battery disconnect and reconnect

    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! [img]/ubbthreads/images/graemlins/confused.gif[/img]

  5. #4
    Jason's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Mar 2005
    Location
    France
    Posts
    186

    Re: TDi more responsive after battery disconnect and reconnect

    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!

  6. #5
    S4_dan's Avatar
    Fire up the Quattro!

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Somewhere in the Howardian Hills!
    Posts
    1,504

    Re: TDi more responsive after battery disconnect and reconnect

    Checked the little pipes...all intact.

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

 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO