failed smog what went wrong with 15mph?

well heres my numbers I dont have a scann so I gonna do best i can
its a sohc zc with CAI and dc sport header and hi-flow cat

mph__rpm__c02___02____hc_____________cco__________ _no
____meas__meas__meas_max_ave____meas_max_ave__meas _max_ave_meas
15 1826 14.1 0.5 142 31 146 .86 .10 .76 873 237 1855 fail
25 2036 14.8 0.3 117 20 88 .76 .09 .33 812 199 805 pass

no clues here I take it lol...

I had the same thing happen with my Accord when I tried to sell it.
It sounds like it's not burning the fuel enough at lower rpm's.
I replaced the plugs, air filter, did an oil change, cap & rotor and added RxP additive. The results were awesome, my numbers were cut in half.
The RxP fuel additive is in a little tiny red bottle and the web site says it reduces emmisions, I bought it Autozone.

nono NO is caused by not enough fuel..its leaning out and everything is new on car just about...I cant seem to figure this thing out!