After taking my car out for a run yesterday, i had run it for abouthalf an hour when allof a sudden the throttle stopped responding, and the car stopped,and when it came to checking the response of my servos, i found that my steering servo was working perfectly, but my throttle servo was only working intermittently. Could this be a dirty connection, or something like that?? Any info would be helpful, thx. It had been working fine before this happened.