If a car comes into my bay with a problem " stalls intermittenly when driving" the very first thing I do before anything else is check the fuel pressure.
Sometimes people dont replace there fuel filters. They over the years do what they are suppoused to do, filter out impurties. Well if it gets to plugged up it can cuase less fuel to flow, not combine this with hitting bumps on the road, moving the stuff around in the tiny line in the fuel filter. You can get a new fuel problem that way.
Quite a few times I have solved your problem by replacing a fuel filter.
