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

Audi A3 TDI - Using fuel

Discussion in 'Diesel forum' started by BlackQuat, Jan 22, 2011.

  1. BlackQuat
    Offline

    BlackQuat Active Member

    Joined:
    Nov 24, 2009
    Messages:
    1,790
    Likes Received:
    2
    We have a 2001 100bhp TDI A3.
    It's doing around 47 mpg on runs lately. I reckon it should be doing alot more.

    What are the first things to check? I have vagcom if there's anything worth checking using that?
    I've changed the thermostat and temp sensor. No better.

    Cheers in advance.
    #1
  2. Fahim
    Offline

    Fahim Member

    Joined:
    Dec 5, 2009
    Messages:
    280
    Likes Received:
    0
    Check for boost leaks with VAG COM to look for 'Requested boost and actual boost' figures.

    if requested boost is high and actual boost is low, you know you've got a leak somewhere! it'll also probably be smoking quite a lot.

    disconnect maf sensor and see how it drives. if its the same, then its most likely shot. exchange unit from audi costs around £70.

    what sort of run are you doing? how many miles?...motorway or town?
    #2
  3. BlackQuat
    Offline

    BlackQuat Active Member

    Joined:
    Nov 24, 2009
    Messages:
    1,790
    Likes Received:
    2
    Country side runs, about 15 miles aday, relatively easy runs, 80% of the drive is on a main road, ussual just in 5th rolling along.
    I was looking at the car today, whilst idling I disconnected the maf. The revs didn't change at all.
    #3
  4. BlackQuat
    Offline

    BlackQuat Active Member

    Joined:
    Nov 24, 2009
    Messages:
    1,790
    Likes Received:
    2
    Took it for a drive without the maf, and it was totally gutless.
    #4
  5. sulaiman
    Offline

    sulaiman Member

    Joined:
    Jun 2, 2006
    Messages:
    279
    Likes Received:
    0
    Seems good to me, I get 37mpg around town, 45mpg on the motorway.
    #5
  6. BlackQuat
    Offline

    BlackQuat Active Member

    Joined:
    Nov 24, 2009
    Messages:
    1,790
    Likes Received:
    2
    My 2.5 tdi quattro is doing 45 on the motorway!
    #6
  7. HerefordQuattro
    Offline

    HerefordQuattro Member

    Joined:
    Feb 23, 2010
    Messages:
    303
    Likes Received:
    0

    bloody hell wish mine did!
    #7
  8. swarcup
    Offline

    swarcup Active Member

    Joined:
    Sep 9, 2009
    Messages:
    1,285
    Likes Received:
    1
    shit me too!!!!!
    #8
  9. BlackQuat
    Offline

    BlackQuat Active Member

    Joined:
    Nov 24, 2009
    Messages:
    1,790
    Likes Received:
    2
    Sorry gents, I must be a gentle driver lol.
    I recently did a 300 mile journey to invergarry in scotland. Got there, filled up 44.8mpg worked out at the pump. I was rather happy with that.

    The A3 should be doing more.
    #9
  10. BlackQuat
    Offline

    BlackQuat Active Member

    Joined:
    Nov 24, 2009
    Messages:
    1,790
    Likes Received:
    2
    [​IMG]
    [​IMG]


    Do these tell you anything? I'm not sure if that's normal
    #10

Share This Page