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

what does this do?

olds_kool Aug 14, 2008

  1. olds_kool

    olds_kool Active Member VCDS Map User

    Messages:
    1,089
    Likes Received:
    11
    Trophy Points:
    38
    trying to figure out an intermittant starting problem and poor performance on my 2.5 tdi and came accross this
    [​IMG]

    it seems to be a vacuum operated choke between intercooler and inlet manifold, vacuum pipe connects to something under power steering resevoir cover, replaced vacuum hose as it had a split, but it never seems to operate, thought it might be a cold start choke so attached vacuum gauge before starting from cold but nothing there

    anyone got any idea what its for? do diesels need a choke for cold starts? first diesel ive owned so still learning !
     
  2. me8cat

    me8cat New Member

    Messages:
    12
    Likes Received:
    0
    Trophy Points:
    1
    This vaccum unit works intake manifold flap which only works when switching OFF
    engine. Operates flap which cuts off air to engine so engine stops smoothly. Opens again 2-3 seconds after engine has stopped.
     

Share This Page