lack of fuel
Very likely an alternator problem; if the alt is not working soon the battery would be drained and the truck would shut off.
No
Could be a shorted wire, or bad battery.
I'd recommend you do a battery test and charging system test. The battery would be my first suspect.
Yes it can.
There are a couple of a reasons why a 1994 Ford F150 truck will not start. The truck may have a dead battery or the spark plugs need to be replaced.
the ground to the battery i had the same problem on my truck
bad fuel bad spark plugs incorrect timing
water in the fuel can cause an idling motor to sputter and/or die.
a rapist in your trunk
Yes. When you suspect it is clogged, replace it.
Most common cause would be the plus wires. Dampness causes them to arc and the cylinder that the wire is arcing on won't fire causing a miss/sputter.