94 F 150 in line 6 5 speed. Been driving for many years one day didn't start, next day starts right up runs fine. It happened again same scenario, then spray starting fluid in it starts up right away but wont stay running. Come up to it the next day starts right now runs just fine. Any solutions?

 

First thing I'd do is replace the fuel filter unless it's been done recently. If that doesn't take care of it, the fuel pump may be on its last legs.