Ok i have a 99 t/a with 109000 miles m6. My engine surges all the time. It started out just when i just got on it, now its all the time. Also my rpms drops to about 400-500 when i stop. Ive replaced the fuel filter about a year ago and the plugs and wires about 6 months ago. when i start out fast and put the petal down it takes like half a sec to actually move. Any help would be great!!