I ran my Tornado BB last night and found something wrong. I was running it for about 10 minutes and then the throttle starts to mess up. I give it gas and the car, nor the throttle arm will not move. the steering was working fine, but the throttle has something wrong with it. I put fresh batteries in the car and remote today and still have the same problem, I will run the car and the throttle will keep going out. Any one know if the servo is going bad?