I have a 2000 XC70 turbo that, among other things, has a flutter at about 15 mph. From a stop, it accelerates smoothly, until about 14 or 15 mph. Then I always feel a stutter or flutter till it gets to about 17 mph and then it continues accelerating smoothly. Anyone have any idea what might cause this? I'm not very adept mechanically, but try to keep up after things without taking the car to a mechanic, because I don't have much money. Any information or assistance would be greatly appreciated. Thanks.