Ok i have a JDM b20a with header (DC), exasut, and cam gears(set at zero) in my prelude. 2 days ago i re-did all my timing from TDC when i put the cam gears in. I went to get a smog check today, but luckily before he started the test i asked the mecanic what he thought. He said it seemed ok but i insited that he manualy checked the car first. He did so with no hesitation and fortunately he was having a good day and didnt charge me. Well in the end of his inspection, he checks the exaust with his little machine. Come to find out. my motor will NOT pass smog. So i called the whole thing off and i am trying to figure out how to lower my emmisions. On the machine the Exaust levels are suppose to be 100 and below. My car registers at 234+ up to about 360 at idle. When he reved the car up the emmisions gradually came down to 34. My car also has a rough idle and seems to be missfiring according to the mechanic(i noticed this long ago, but thought nothing of it). I replaced one of my O2 sensors and that seemed to help a little. The only problem i seem to be having the emmisions at or below 100 at idle. ALSO starting tommaro, the Smog place's are REQUIRED to smog all vehicles on a dyno so that they can put a load on the motor. How do you guys think this will affedct the result. Any comments are appreciated. thanks for taking the time to read this. My car wont pass smog. I NEED to know any tricks to lower my emmisions. I have a b20a in my prelude with header exasut cam gears(set at zero) and thats about it. HELP ME!! EDIT: cyl. number one seems to be miss firing.