weird cutting out problem

I got a weird cutting out problem under load when the engine gets over 195 while im driving in stop n go traffic but on the highway it doesnt do it. Also when it started cutting out i put it in neutral and revved it and it doesnt cutout. what would cause that?

I'd post more about your engine and combo, but off the top of my head, i'd say you have a fuel percolation/delivery problem.