Does your 1993 Toyota pickup have a fuel pump or sending unit?
It has both.
I have had 3 Toyota Trucks that have done the same thing. Mine will read full to 3/4 tank....when it drips below that, the guage falls to empty. From my brief research most are blaming the fuel sending unit inside the tank. I have not tried this yet but will get back on here when I do to share the outcome.
First jack up the truck and remove the rear whee, then disconnect the fuel hose and breather hose to the tank. Then loosen the metal bands holding the fuel tank in place. The unscrew the five nuts holding the sending and gauging unit in place, after disengaging the wiring to it. Replace the unit, connect the wires, fasten the nuts, fasten the fuel tank metal bands, then fasten the hoses, make sure there are no…