your right up2lt420 the nem is no joke....
its kinda hard to help without seeing or hearing the truck lol but ill try and help as much as i can
yea but try putting in a new glow plug.
and for the rolling over and diying try a little bit longer fuel line,and MAKE SURE the engine is real tight.
and if none of that solves is post back and let me know im sure i can help you ive been playing with nitro engines for 6 years