ok..been experiencing this a bit...if im going up a steep hill..im talking crawling 40-50* grade about 120+ feet up no pansy off roading here...but if i got full throttle and i let off the truck sometimes dies on me....put the truck in nuetral or park and it starts right back up..what gives? intertia switch?

 

I would check it. The ball can just touch and cut fuel. Doesn't have to engage fully. If it does seat fully, you have to reset the switch.