i have a b16a im trying to bar and i have two ecu's.one is a virgin p30 it runs like crap. the other is a p28 chiped with a stock basemap and a couple disabled sensors,runs great. so my big question is if i put a o2 sensor in and it is disabled in the ecu will it pass smog.i am assuming it wont so if i can get crome and adjust the tables to a leaner ratio and retard it a bit. i heard it will lower nox(jdm motor) but make everthing else higher? if a post alreaday exist with my answer guide me to it otherwise i really cant find any.