it may "seem" tuned right to you
but it is not
the stalling thing is an indication of a bad tune

we cannot say if it's lean, rich or what
but that does not matter anyway

reset the needles to factory and tune the engine

tuning is a huge part of owning and running a nitro rc

to learn how read your manual and watch the dvd that came with your truck

if you don't have that
go here
http://www.traxxas.com/support/kb_se...l&cat=0&id=276

it's not hard
it just takes practice

good luck