Hello,
I have an HPI RS4 2, and I just put a nitro star .15fe in it, it was running great and then I shut it off to take a break, and i went back to start it and it started up and the engine just started running full throttle and went wild, i checked to see if the throttle was on idle and everything looks fine, whats the problem? Help!
some people say i have carborator problems, but i dont know what to do.

Thanks