Time for emission test again. I took at look at my last one: HC 5 / limit 58 CO .01/limit .32 NO 354 / limit 435
Car has about 75k miles on it, driven only about 30 minutes a day at highway speeds. Car was just serviced: new fuel filter, air filter. oil change, with engine flush, new plugs, recent new DI casette, injector cleaning. It still has original Cat and O2 sensor. I am curious if it will fail the NO this time. Anyone know what contributes to NO increase??