This is not entirely true. I adjusted my mixture screw without the analyzer and went to get the emission tested the next day. Those guys working at the emissions testing place were surprised that such an old car can run so clean! Here are my results: HC 5 (state limit 220), CO% 0.00 (state limit 1.20), CO2% 11.9 with no limit. So it is possible to adjust that screw 'by feel' but it's not easy. Good with your adjustments! Tom Niemczewski tomciodmc@xxxx vin 6298 ----- Original Message ----- > How did you "adjust" the mixture screw? It can only be correctly done > with an exhaust gas anylizer. > David Teitelbaum > vin 10757