peak boost problem 1.8t

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  • AUDI COUPE 20V
    S2Forum Addict
    • Nov 2005
    • 251
    • Country: United Kingdom

    #1

    peak boost problem 1.8t

    hi i know it is not an s2 but i have a a3 1.8t quattro and has a mrc custom map and has been running great until this week what happens is it hits 1.3 bar and drops straight down to around 1 or bit less , before it would hold at 1.3 bar and keep pulling well , put on vag com with no errors , checked boost pipes which seem ok , only one i can see is that the one going on to the throttle body has been rubbing but i removed the pipe put a light against it but seemed ok , ?
  • Greg_S
    Administrator
    • Jul 2003
    • 12430
    • Country: United Kingdom

    #2
    does sound like a boost leak issue tbh
    Greg

    S2Forum.com Administrator & Webmaster

    '93 Coupe with a few tweeks

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    • AUDI COUPE 20V
      S2Forum Addict
      • Nov 2005
      • 251
      • Country: United Kingdom

      #3
      how about the wastegate actuator could it be that?

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