I messed with the timing a bit today and got the engine idling nicely in park and in drive. The engine idles now at around 6-7k rpm in gear. I went to take it for a drive but the car is still accelerating on it's own, especially in reverse. If I just barely tap the gas pedal it'll take off and keep accelerating for several seconds. It seems like the carb is getting too much fuel. Any suggestions? Thanks