My latest pony is a 2002 Convertible with a V6 automatic. I have only had it about a month. I have noticed that when the engine is cold, it starts fine, but when I shift into drive or reverse, the engine seems to misfire, or at least it feels and sounds that way. If I hold the brake it will do that for several minutes then go away. If I drive off it seems to run fine and go away quickly. Any guesses as to the cause out there?