First of take it easy, in this Hobby patience is a necessity. Second reset your needle valve settings at the factory recommendations. I take it that you own a Torq .16...it's a reliable engine, i've had one in the past so it's probably just a tuning issue. Did you manage to break in the engine successfully? Have your broken it in? Give us more input on needle valve settings and fuel being used, and type of glow plug you have etc...