it's possible that maybe it needs a new glow plug,it may not be able to handle the fuel and gets snuffed out? I installed a new plug in my chopper, hovered it a few times the day before went out the next day did a few hovers fired it up for the third time that day set the idle up before take off and it would all of sudden fall flat, installed a new plug and wolah!.. it was fine...the matrix has plenty of air intake that isnt your problem.