Does a 1993 F-150 have a fuel shut off switch and if so how do you go about opening the fuel back up to the engine 351W?

Check the Inertia switch, it is usually located near the gas tank. Your owners manual or a parts store can help you with the location. Usually they can be reset. They are there to stop the electric fuel pump in a roll over or sudden impact but can sometimes be triggered by going over a large pothole or bump or stopping too quickly.

Look behind passenger side kick panel,push down on top of switch to reset.