<from original question poster> Hi Everyone, This is the last post related to my high hydrocarbon problem. >From the last email, my car failed the smog check again even though I have done most of stuff including ajusting CO. The most interesting thing about my last smog check is that the HC reading is varying between 80 to 240 ppm (120ppm is max limit) Last week, my _new_ mechanic discovered I have a bad fuel injector (#2). By cleaning all the fuel injectors, my car passed the smog check with out problems. I like to thanks every one who helps me. Rob from PJ Grady also has been extremely helpful. I also like to thanks him for that. rendy