Same thing happend with me I found out my carb had some o ring pieces in there so i cleaned the carb and it was fine, or just take for a pro tune up at ahobby shop, but mine is modified to the extreme, pro-line agitator rims, wrapped with dirthawg 2's, cvec dual exhaust pipe, 3racing head, revo shocks, t6 aluminum tie rods, k&n air filter, and a fuel filter with venom fuelline