Got a problem with the 200tqw. When accelerating [usually comes in between 2,500 & 3,800rpm] the car feels like it is stuttering. Akin to a miss, but when you back off the gas it feels almost normal. Hard to describe. Feels almost like it is running too rich in that area. Only shows up when the car is moving, not in neutral. I'm baffled. Help? Thanks, Bruce