Can MAF cause Rich running a bad idle?

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  • Jonas_R
    S2Forum Possessed
    • Jan 2004
    • 3781
    • Country: Denmark

    #1

    Can MAF cause Rich running a bad idle?

    Oki i need some kinda advice here, tried to search but get many different answers.

    It seems that when my car gets warm that would be around 94 degress (one line over 90 degress). Then it begins to hesitate and running rich when driving around 1200 rpm in 2.nd and given gas. It simple hesitates and you can fell that.
    Then if i press the clutch it start to stall and sometimes the engine even turns off.

    I have recently change both temp sensor on engine blok, lambda, clean ISV and MAF which helped a bit, but problem is back.
    Iam going to change N75 valve, Diverter valve, all hoses + got the samco kit.

    Then when this is done i gone to borrow a MAF from my friend.

    But can the MAF also cause poor idle i mean if it is making the engine run rich, then idle would be a problem?

    Also iam going to meassure the lambda probe to see if it is oki.

    Any suggestions since this is seriously driving me insane.

    /Jonas R.
    Sleeper S2 Avant +450

    A6 Avant 2.7t Stage 3

    Audi S2 Coupe RS2'ed
  • QuattroFever
    S2Forum Extremist
    • May 2006
    • 1360
    • Country: United Kingdom

    #2
    sorry to dig up old thread. was this ever solved???
    Volcano ABY coupe

    Ant

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    • Jonas_R
      S2Forum Possessed
      • Jan 2004
      • 3781
      • Country: Denmark

      #3
      Yeah my problem was solved, but I have been through a big process of tuning the car
      Sleeper S2 Avant +450

      A6 Avant 2.7t Stage 3

      Audi S2 Coupe RS2'ed

      Comment

      • A80Avant
        S2Forum Obsessed
        • Sep 2005
        • 10873
        • Country: Greece

        #4
        tell the solution as well! was it the maf?

        Comment

        • Jonas_R
          S2Forum Possessed
          • Jan 2004
          • 3781
          • Country: Denmark

          #5
          I cant tell you what the solution is, my best guess is that the map was running to rich causing unburnt fuel to get the car to run bad.
          Sleeper S2 Avant +450

          A6 Avant 2.7t Stage 3

          Audi S2 Coupe RS2'ed

          Comment

          • Casper...
            S2Forum Enthusiast
            • Jul 2007
            • 120
            • Country: Denmark

            #6
            can it be the throttle switch/potentiometer ?
            Since it only happens when the engine temp is high

            Casper...
            Last edited by Casper...; 22 June 2008, 10:42.

            Comment

            • QuattroFever
              S2Forum Extremist
              • May 2006
              • 1360
              • Country: United Kingdom

              #7
              thats exactly whats stumping me. Only when its hot it starts to play up and when sitting in traffic. if your on a long run it's fine, then if you hit a set of lights a few times in a row it starts to come back!
              Volcano ABY coupe

              Ant

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