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

What should the BTDC be ona bkd?

Discussion in 'A3/S3/Sportback (8P Chassis)' started by Ade6, Jun 14, 2013.

  1. Ade6
    Offline

    Ade6 Member

    Joined:
    Apr 11, 2013
    Messages:
    100
    Likes Received:
    0
    [Jun 14, 2013]
    In the wngine measuring blocks i think its either 15-4-5?! One of those it says BTDC mine says 0.0 BTDC is that okay? Its winding over longer before it starts and it starts with abit of a miss for a couple of seconds!
    #1
  2. Ads

    Ads

    [Sep 17, 2014]

  3. max69vk
    Offline

    max69vk Active Member

    Joined:
    Apr 3, 2012
    Messages:
    760
    Likes Received:
    43
    [Jun 14, 2013]
    When warming up from stone cold (under 50C) injection will be around 1-2 degrees BTDC, this then retards as the car heats up to around 4-5 degrees ATDC.
    #2
  4. Ade6
    Offline

    Ade6 Member

    Joined:
    Apr 11, 2013
    Messages:
    100
    Likes Received:
    0
    [Jun 14, 2013]
    Mine stays at 0.0 BTDC. How is this ajusted? Mt torsion value in on 0.5 ant idle consumpion is 0.4-0.6 l/h.
    #3
  5. max69vk
    Offline

    max69vk Active Member

    Joined:
    Apr 3, 2012
    Messages:
    760
    Likes Received:
    43
    [Jun 14, 2013]
    What group are you getting your readings from in VCDS?

    There's a whole host of thing that will affect this figure, rpm, temp, fuel quality etc as the ECU will constantly be adjusting though the warm up phase. One thing you definately dont want is a figure in BTDC when warmed up as its runs the risk of pushing the crank rotation in the wrong direction!
    Last edited: Jun 14, 2013
    #4
  6. Ade6
    Offline

    Ade6 Member

    Joined:
    Apr 11, 2013
    Messages:
    100
    Likes Received:
    0
    [Jun 14, 2013]
    I think its group 4 or could be 5 or 15. Ha, i have droped the idle speed to 819 rpm to cure the rough idle would this be why its taking longer to crank into life?
    #5

Share This Page