Smogs thread for the 1.9 is the same as the 1.6.The #7 screw is what you will use to lower your idle.Be careful as this adjustment screw is usually seized up.Spray it with penetrating oil and work it back and forth very carefully as part of it is plastic.I believe that turning clockwise lowers the idle.http://vwdiesel.net/phpBB/viewtopic.php?t=579&start=0