Engine shuts off while driving

Also if its is the crankshaft sensor why would it start working again after about a hour or two sitting

Where is the crankshaft position sensor located on a 1995 ford exployer 4.0 4wd

Ok when the engine stalled I took normal water and cooled the crankshaft sensor for 5 minutes. I did this six times to make sure it did it every time the same. All 6 times the engine restarted after 5 minutes. Since the water was sprayed there and some may have hit other area would there be anything else that you can think of when I cooled that area down that would have the same affect