I Just bought this car and it drives great most of the time but some times when I first start it, it will not have any throttle response, it starts and idles fine but if I keep pushing the gas pedal down it does not pick up speed and if if I push half way or more down on gas pedal it bucks real hard, at first I could turn it on and off a couple of times and the problem would go away but now it happens more often if I drive it for 10+ minutes and shut it off chances are good that it will act up until it gets cold, the other day I drove it and it would not accelerate more than 15 miles per hour and I drove it like that for about 5 minutes and then all of a sudden it picked up speed and drove like normal, any help would be greatly appreciated, the check engine light is on but I do not have a way to pull out codes. Art.