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

PLEASE HELP!!!??? Overfueling?? Airflow sensor??

Discussion in 'A4/S4 forum(B5 Chassis)' started by sam4191, May 31, 2009.

  1. sam4191
    Offline

    sam4191 If In doubt, Flat out!

    Joined:
    Feb 23, 2009
    Messages:
    401
    Likes Received:
    3
    [May 31, 2009]
    Hi guys!

    I'm fed up with my car now! When I start it sometimes, it cranks, but doesn't fire until I floor the throttle. Then it coughs and splutters, then unless i rev it over 3000rpm it stalls. If I rev it a few times, quite hard, then leave it to idle for a minute or so, it's fine to drive. other wise it just stalls again. and sequence is repeated.

    I have drilled holes in the air box:whistle2:... this wouldn't make any difference would it!? Just that it smells hidiously rich when it does fire, even smoked earlier!:( It's fine to drive though.

    I would be sooooo greatful if anyone could point me in a few directions on this one please!?

    Thanks
    Sam
    #1
  2. Ads

    Ads

    [Sep 22, 2014]

  3. aragorn
    Online

    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

    Joined:
    Jan 30, 2008
    Messages:
    15,580
    Likes Received:
    314
    [Jun 1, 2009]
    Coolant temperature sensor or AFM?

    Have you scanned it with Vagcom and seen if there are any fault codes?
    #2
  4. sam4191
    Offline

    sam4191 If In doubt, Flat out!

    Joined:
    Feb 23, 2009
    Messages:
    401
    Likes Received:
    3
    [Jun 1, 2009]
    Aha... i think i will get to the coolant temp sensor. That is the only fault that has come up on my Vagcom. I didnt think that would have any relevance though. :-s

    I will sort that out asap and let you know if it sorts it. Any idea on where abouts it is situated on the v6?

    Thanks alot!:sm4:
    #3
  5. aragorn
    Online

    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

    Joined:
    Jan 30, 2008
    Messages:
    15,580
    Likes Received:
    314
    [Jun 1, 2009]
    If the motor thinks its cold it adds extra fuel, which knocks the mixture out and it doesnt start.

    Bit like trying to start an old carbed engine with the choke on.
    #4
  6. sam4191
    Offline

    sam4191 If In doubt, Flat out!

    Joined:
    Feb 23, 2009
    Messages:
    401
    Likes Received:
    3
    [Jun 1, 2009]
    ahhhh that makes perfect sence! Thanks alot Aragorn!:salute:
    #5
  7. sam4191
    Offline

    sam4191 If In doubt, Flat out!

    Joined:
    Feb 23, 2009
    Messages:
    401
    Likes Received:
    3
    [Jun 5, 2009]
    Just a quick update..... I fitted a new Coolant sensor today. What a b***ch that was!? lol! anyway... Vagcom now reads no faults in the engine, and temp. guage works again! woo! Makes me feel alot more confident! thanks for the help again aragorn!
    #6
  8. dieselfitter251
    Offline

    dieselfitter251 Blow ma own trumpet?

    Joined:
    Jun 3, 2007
    Messages:
    1,120
    Likes Received:
    0
    [Jun 5, 2009]
    Hah, takes me back. I remember changing the carb on my 1.1 escort, forgot to reconnect the choke...middle of winter at midnight in Scotland after sitting for 4 hours, that was fun trying to get it started! (aye back to front problem I know- any bosy miss carburetors?)

    Glad you got it sorted. The guys on here really know their stuff :arco:
    #7
  9. sam4191
    Offline

    sam4191 If In doubt, Flat out!

    Joined:
    Feb 23, 2009
    Messages:
    401
    Likes Received:
    3
    [Jun 5, 2009]
    LOL! Sounds fun...

    Thanks, they do!

    Just a matter of interest... what is the mileage on teabag now?
    #8
  10. dieselfitter251
    Offline

    dieselfitter251 Blow ma own trumpet?

    Joined:
    Jun 3, 2007
    Messages:
    1,120
    Likes Received:
    0
    [Jun 5, 2009]
    243.4ish k Had a guy looking at it. He drove a standard 97 A4 1,9tdi. He seemed quite indifferant all round about that car but not entirely negative either, and, get this... the body work on his looked even worse!!! I think the bouncy break pedal will put him off. Said he wanted a 4wheel drive to get him to more inaccesable fishing spots....?! We'll see. 28 watchers now!
    #9
  11. sam4191
    Offline

    sam4191 If In doubt, Flat out!

    Joined:
    Feb 23, 2009
    Messages:
    401
    Likes Received:
    3
    [Jun 6, 2009]
    Cor! Not bad! Infact pretty impressive!

    And no doubt, his had half the mileage!? lol! Some people have funny idea's! well, good luck with the sale mate! shame to see you letting her go!
    #10

Share This Page