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    Thread: idle increased 200 rpm

    1. 09-09-2012 03:16 AM #1
      the car is a 1984 gti rabbit

      I just removed the throttle body rubber boot and sprayed the throttle blades with carb cleaner, I tok a toothbruch to them and got them clean

      I also removed the boot from the air sensor plate (above the air filter) and claned the plate and hte surrounding surface. I took a magent to the center bolt on the plate and lifted it up and cleaned the edges and mating surfaces.

      now my idle is about 200 rpm higher.

      is my car now running richer or leaner?

    2. Member
      Join Date
      Mar 31st, 2008
      PNW - Oregon
      92 Jetta GLI 1.6TD Ripper (VNT20 Turbo), 86 GTI (Wolfsburg Golf), 86 Audi Coupe GT
      09-10-2012 09:21 PM #2
      its not running richer or leaner, just 200rpm higher..

      as long as you did not mess with the setting on the fuel distributor, then its exactly the same mixture as it was before you cleaned the throttle body..

      you can turn the idle back down to where it used to be, with the idle screw.. its pointing towards the firewall on mk1 cars..

    3. Member
      Join Date
      Apr 16th, 2006
      Brokelyn, NY
      90 fox, 85 gli
      09-10-2012 09:23 PM #3
      you may have not secured one of the boots on fully, resulting in an air leak. the ecu sees lean from the o2 sensor and compensates, resulting in a higher idle.

      you can determine your mixture properly with a dwell meter, or just warm the car up, unplug the o2 sensor and measure the voltage.
      I really suck at smog.

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