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

Check to make sure the throttle is actually working. Then,,, if it is, take it back to where you purchased it. good luck.

ZB

....there's a little set screw that holds the throttle arm
to the carb barrel....see if it hasn't come loose on you.

Dave.