[john walker's workshop]

get it hot, unplug the oxygen sensor, clamp the airpump hose between the pump and the gulp valve, turn the CO adjuster counterclockwise a bit at a time, until you hear the idle speed decrease somewhat. leaning the idle mix eventually causes the idle speed to slow, somewhere around 2% or less. keep leaning a bit more, as long as the idle doesn't get too rough. then plug the oxygen sensor back in, and unclamp the air pump. the oxy sensor will put the mixture where it wants to. there must be a shop near you that will do a sniff test for cheap or free.