well, im newbish with nitro myself, but having had a bevy of issues, i'm kinda feeling a little bit in the know. I'd set the carb settings back to factor spec, and make sure there are no air leaks and the battery on the truck is fully charged, and throttle linkage in good working order, not stuck or binding with anything.Sorry its kinda vague. but these are most of the suggestions you will get at first.