I have a 1993 Classic Se-R w/95,000 miles. I was driving home from my brothers apt, on the highway, when the car started spuddering when I down shifted to pass a car. Next thing I know the car was spuddering at all RPM's and in every gear. The car seems to be running rich. Also, the car was spuddering when I was in neutral. Does anyone know what this could? Brad Shenkman 93 Classic