The CO adjustment screw has a wide range of adjustment and the car will still run. A couple of threads should be visible on top. Usually you would make a hand adjustment based on the type of smoke from the tail pipe. White smoke is too lean and black smoke is too rich. Of course the best way is with a CO analyzer. But if you don't have one handy you can use a regular dwell meter and follow the procedure at http://personal.picusnet.com/dsontos/tuneup.htm If you are having trouble getting the car to run check your injectors and make sure you have a good cone shaped spray pattern. Then check your spark. Maybe a tuneup is necessary. > Now, does anyone out there know a good starting place to set the 3mm CO2 > adjustment screw thingy if they were actually dumb enough to diasemble to air > metering housing and play around in there?