Okay I have taken my n/a stang down to the local emissions testing site now for the second time and failed. The first time I failed and gave it the standard tune up. You know plugs, wires, cap, rotor, and air filter. I used some carb cleaner in a tank ran that through, and then filled the tank up with premium. Drove on the freeway got the car warmed up and ready to go. Now both times my hydro carbons at rpm were just on the money. Where I failed was at idle both times my hydro carbons were through the roof! I had a 1200 the first time. Then a 1300 the next. My test results were worse the second time around after the tune up.