Recently, the engine started hesitating when I accelerate. Thought it was water in the gas tank, but the usual water removal additives did not work. The problem does not occur at idle nor at cruising speed, only during acceleration. If I accelerate really slowly, most of the time the problem does not occur. However, I am too young to be beaten off lights by tractor-trailers, so if anyone has some ideas, or has a similar problem, I would appreciate hearing from them.