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  1. #1
    olds_kool's Avatar
    5th Gear

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    Offline
    Join Date
    Jul 2007
    Location
    stoke on trent
    Posts
    1,067

    what does this do?

    trying to figure out an intermittant starting problem and poor performance on my 2.5 tdi and came accross this


    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. # ADS
    ADS
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    Always
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    Global
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  3. #2
    Reverse Gear

    Status
    Offline
    Join Date
    Aug 2008
    Posts
    12
    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.

 

 

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