I just failed smog with retarded numbers. My co2 and Nox are okay but my HC is 3-6 ppm over the legal limit. Any suggestions? I was running pulstar iridiums but swapped them out for coppers to see if it would do anything and still failed.
Put fuel injector cleaner in it, seafoamed the car, changed cap and rotor, wires are 7 months old. O2 sensor was also changed this year. Any ideas anyone?