Once again, I have failed my annual smog test! 935 HCppm @ idle, and 1135 @ 2500 RPMs. Last year, I had to go thru this same fiasco, and performed yet ANOTHER 30K mile servicing. Plugs, wires, cap, rotor, ignition coil, balast resistor, and CO adjustment (plus a new Control Pressure Regulator from DMCH 2 months before). After that, the output was 11 ppm on the hydrocarbons. Now, a year later, I'm right back where I started!!!!! Other than regular oil changes & about 12K more miles on the clock, nothing, I repeat nothing has been done to the engine. So what gives. Yes, I know I need to pull a spark plug to check for fowling, but I am really sick and tired of having to tune the motor annually just to get it to pass. That an a line of incompetent mechanics before me scrwed up, and inserted 3 of the plugs in crooked! This I discovered the first time I did the servicing myself. So the question is what can I do to get my car to pass emissions, and quick? Will a small CO adjustment take care of things?, and what about those gasoline additives that guarantee you to pass emissions testing? I know that there is no such thing as a mechanic in a bottle, but I am indeed curious as to just what in the hell do these chemicals do? I'm not trying to take the cheap way out of things here. It's just that I am exhausted on having to keep shelling out so much money every year. Any help, or at least ideas would be greatly appriciated! -Robert vin 6585 "X"