ive ran about 11 tanks through it so far taking it easy till about the 11th, i had to get on it and my steering servo is weak and my throttle servo is just going back and forth making the carb open to full throttle and goes back to idle and does this over and over till i hit the brakes...then it just stops and sounds like it is straining and thats when i shut it off...i dont wanna strip any gears yet(cant afford servo's at the moment)and it does this without the car started....and also while engine was running