I had the same problem from 2 days ago. yesterday I cleaned the throttle body, changed plugs as they where filthy and the tip had worn down and the gap was quiet big, cleaned the air filters and box, I also made a few small holes in the air filter. once i put everything together again and drove the car it seemed more responsive. I haven't had any problems yet but I'm still giving it a few days before I can say everything is OK. =D Qas