my 92 civic si, single cam v-tec was running perfect then all of a sudden started hesitating/stuttering off idle...runs rough until about 3k then it smooths out. Does anyone have any idea what it might be?? just put new plugs about 2 weeks ago...i actually tried pulling out one of the plugs to see it if was fouling or anything and...ITS STUCK i can't pull it out...anyone have any idea how to get the plug out without damaging the head?