I took my grandmas pickup in and failed smog for the second time today

first time my numbers were

%C02 %02 HC CO NO
15 mph 12 4.2 23 0.03 661
25 mph 11.9 4.4 18 0.03 679



I found a cracked vacuume line to EGR valve and fixed with a bit of rubber hose. Seafoamed my intakeand crankcase, new copper sparkplugs and cleaned ERG with carb cleaner. THen a 10 30 oil change to get sea foam out of crank case after a couple days.

This time it passed the 15 mph but still failed the 25 mph on the NO(ppm) section.

%C02 %02 HC CO NO
15 mph 11.8 4.5 23 0.03 601
25 mph 11.6 4.7 17 0.03 498

Anyone have any tips or advice to troubleshoot this? Guy at the smog place said 02 sensors fail every 60k miles but I'm not really sure that would affect the NO emissions.


Any help would be apreciated.
Thanks