i just bought a used t maxx. at firstt it wouldnt start because it was cold but we finaly got it warmed up and started. then i run it for a while today and i tried to tune the carb and it started to shut off when i pulled the throttle to much. so i moved the screw to be richer but it never started. we put the screw all the way back in and pulled it to 2.5 turns which is factory break in settings and it now dosent start at all. the easy start turns the piston and the glow plug glows and fuel is injected put it wont start. I NEED HELP!!!!