here are the results of my smog test, maybe i am missing other things you guys can catch for me:

15mph @ 1474rpm:
%CO2: 14.6
%02: 0.0
HC (PPM): Max: 86, Ave: 21, Meas: 160
CO (%): Max: 0.50, Ave: 0.06, Meas: 0.16
NO (PPM): Max: 697, Ave: 150, Meas: 903

25mph @ 1423rpm:
%CO2: 14.5
%02: 0.1
HC (PPM): Max: 51, Ave: 13, Meas: 64
CO (%): Max: 0.48, Ave: 0.05, Meas: 0.04
NO (PPM): Max: 724, Ave: 136, Meas: 237

Bold results are fail

Does it make sense that my nox emissions for 25mph pass but fail at 15mph?