UrS6 - Check this is right on your car !

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  • macspring
    S2Forum Zealot
    • Mar 2005
    • 6371
    • Home: Ireland Current: Wallis & Futuna

    #1

    UrS6 - Check this is right on your car !

    My UrS6 was going ok, but it didn't seem to boost as early and as 'hard' as it used to, and the digital boost gauge on the dash didn't seem to be going as high as it used to go.

    The drop was comparatively subtle and wan't really a big deal I thought, as I wasn't prompted to search it out. I was thinking it might be the fuel pressure regulator, and new one might improve the situation. I was wrong on both counts, see below.

    So while fiddling with the car yesterday I took off the plastic shroud cover on the bulkhead at the back of the engine bay. After re-tidying the routing non oem TFSI coil cables under this cover, I noticed a 'snapped' small white plastic vacuum T-piece connector had snapped.

    I replaced it with one I found in the garage and the car is 'transformed'. It boosts earlier and harder and pulls to the red line with even more enthusiasm than normal. From the way it drives now, it's been broken a while. Things are always more obvious after you've fixed it.

    I must have broken it the last time I was 'in there' fiddling around and not noticed. It is small delicate, and now brittle after 19 years of heat cycling.

    Does anyone have the part number to get two spare ones ?

    The lower section of the T-piece the black rubber pipe, with a blue strip, goes to the bottom of the back of the inlet manifold. The RHS one goes off to beside the the power steering reservoir and in through the RHD passenger wing. Does anyone know what's in there and what this particular vacuum circuit is for ?

    The LHS of the T-piece goes into the wall of the bulkhead.

    The reason for sharing this is that I would respectively suggest that UrS6 owners check their small white plastic T-piece is not cracked or broken. If it is is you'll enjoy the way the car drives after it's fixed.

    It is ironic that the clutch is acting up at the same time as this.

    This vacuum T-piece could also be on the B4 S cars also.

    HTH some one.
    Last edited by macspring; 5 September 2016, 17:24.
  • UrS4boy
    S2Forum Obsessed
    • Feb 2006
    • 11859
    • Country: Canada

    #2
    UrS4/S6 vacuum/boost signal lines

    I don't think that "T" is an available part. That said, any brass or plastic "T" of the same dimensions will work.

    As to where the lines go, these diagrams might help you:







    REFERENCE:

    UrS4/S6 vacuum/boost signal lines:


    The Audi Enthusiast website. Forums for all Audis including A4, S4, A5, S5, A6, S6, allroad, A8, S8, TT, R8, Q5, Q7, 4000, 100, 200, v6, v8, vintage, local forums


    Good luck.
    RS2'd 93 UrS4 5 spd sedan
    94 UrS4 V8 6 spd manual avant

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    • Vorsprung durch Technik
      S2Forum Freak
      • Jun 2007
      • 4754
      • Country: United Kingdom

      #3
      Thanks for letting us know Macspring.




      96 URS6 plus speck saloon
      96 URS6 plus speck estate
      94 2.6 80 Avant
      99 2.8 final edition Cabriolet

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      • macspring
        S2Forum Zealot
        • Mar 2005
        • 6371
        • Home: Ireland Current: Wallis & Futuna

        #4
        Originally posted by macspring

        The lower section of the T-piece the black rubber pipe goes to the bottom of the back of the inlet manifold. The RHS one goes off to beside the the power steering reservoir and in through the RHD passenger wing. Does anyone know what's in there and what this particular vacuum circuit is for ?

        The LHS of the T-piece goes into the wall of the bulkhead.
        My apologies, I forgot to add in the words "blue strip" as part of the description on the black rubber hose.

        Original post corrected.






        Comment

        • BruceLeeURS6
          S2Forum Fanatic
          • Jul 2016
          • 72
          • Country: United Kingdom

          #5
          yeah Great post here il keep it in mind for my s6

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