Lumpy Idle on RS2

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  • herald
    S2Forum Fanatic
    • Apr 2011
    • 76
    • Country: United Kingdom

    #1

    Lumpy Idle on RS2

    My RS2 has a slightly lumpy idle, but drives beautifully otherwise and goes as it should. It just misses ever so slightly on idle every second or two. 135000 miles, it was doing it before and after the recent cambelt renewal and changing the spark plugs has made little difference. Fuel consumption seems about right, ie heavy around town and late 20s mpg (uk gallons) on a run. I just know it shouldn't do it and am out of ideas.
  • Al Wyn
    S2Forum Possessed
    • Nov 2006
    • 3746
    • Country: United Kingdom

    #2
    Could just be something like a dirty maf or isv possibly
    S2 + RS2 yep ive had a few love em... Laser red S2 avant... Brilliant black lhd RS2... Polar silver RS2... RS blau RS2... CheeRS Al

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    • S2central.net
      Retired OG Mod
      • Jul 2003
      • 16590
      • Country: Northern Ireland

      #3
      @herald... do you have vagcom / vcds ?

      if so then we can learn some more by looking at certain logs.
      Paul Nugent
      Webmaster http://S2central.net
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      1994 S2 Coupe ABY - aka Project Lazarus
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      • herald
        S2Forum Fanatic
        • Apr 2011
        • 76
        • Country: United Kingdom

        #4
        Hello, I don't have them, but I do have easy access to Audi's own diagnostics machines. What should I get looked at? MAF looks clean, throttle body has been cleaned and checked.

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        • prj
          S2Forum Zealot
          • Mar 2010
          • 6308
          • Country: Estonia

          #5
          Slight misfire at idle = bad coil or pos channel.
          http://tuner.ee - http://www.facebook.com/tuner.ee

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          • Fat Audi 80
            Super Moderator
            • Jan 2004
            • 10547
            • Country: England

            #6
            or even the Coilpack boots, although this tends to show up at higher engine loads.
            The Perfectionist
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            Audi Class Concours winner Stoner Park 2014, ADI Concours D'Elegance Class Winner 2008, Runner up 2014. Winner, S2Forum Show'n'Shine Billing 2006 & 2008.

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