Well over the weekend I went out and got some NGK BR7EF plugs because I heard Tim recommended them. Ever since they were installed the car hesitatesfrom a stop before it gets going and feels really sluggish below 3000rpm. This morning I got on it and then slowed down to a stop light. When the light turned green the car wouldn't go past 2000 rpm with the pedal to the floor and white smoke was everywhere coming out of my exhaust. After I got going it did ok and didn't do it again after that. I was thinking that when I got on it and let off that the car was still trying to burn off the excess fuel and when I went to go again it flooded it? What do you guys think I'm kind of scared?