get an engine diagnostic check, a lot of different problems can contribute to your situation.
2001 sienna stall while just stop while driving. electric just cut out power, then switch can operated but idling roughling
There are several things that can cause your Jeep to stall while idling. The timing may be off or your fuel filter may be clogged.
Yupp Clogged fuel filter. Hole in the gas line.
prob a vacume leak
Try this solution. http://www.leckemby.net/windstar/windstar01.html It seems that Windstars have a problem with the intake manifold.
It could stall if you use the rear brake while going downhill. Is this the case?
More info will be needed to properly answer your question. There could be a multitude of reasons. Does your vehicle start at all? Does it stall while driving or idling?
it maybe just a timing problem
The most likely cause of a 1992 Ford Aerostar stalling while idling is bad spark plugs. The plugs should be changed and the timing checked to resolve the problem.
Fuel pump
yes
Oil in the distributor.