I made it through another year of inspections, with my emissions testing. Ive kept track of the results over the years, and frankly they seem to bounce around. No trend up or down. I think there is more to the values that are read by the machine than just the car's performance, like the test machine, gas, tester, weather?

1990 240 Volvo Emissions Testing History, New Jersey Inspection

Emissions Results
Gas Standard1999 2001 2003 2005 2007
NO 1273 1117 1234 946 578 987
HC 167 75 73 71 43 78
CO% 0.94 0.38 0.56 0.43 0.31 0.39
CO2% 14.7 16 14.6 15 14.4
O2% 0 0.5 0.7 0.2 0.1