Idle control solonoid. the vacuum line has probably blown a hose. most likely just needs to be re-connected. try a small nylon zip-tie if it wont stay by itself.
freeze plugs?
There are several things that can cause your 1996 Ford Explorer to stall in start hard. The most common cause is a fuel pump that is going bad.
I would start off by checking any vaccum hoses for leaks.
It most likely is the air temp sensor. they are 20 dollars. I would also suggest replacing your PCV valve and your thermostat.
It stalls even when warm
Idle Air Control Valve would be a good place to start.
Check the fuel pump?
Replace the Idle Air Control Valve only about $50. This would cause funny idling and stalling out.
what year?era is specific.
It's on the verge of vapor lock.
Start by replacing the battery in the remote.
blown piston