ok, I have a 16v. its a 9a and yesturday it hesitated going up my hill to my house. then today, when I was driving, it started backfiring. I stopped at an intersection and when I tried to go, it gave me the bouncy idle and started backfiring and a huge black cloud of smoke appeared behind me. its happened like 3 times on the way home from work. I turned up the mix last week and just checked the plugs and they are golden brown. so i don't think I am running rich at all. any help would be appretiated.