The fuel pump is located in the tank and gas is used to keep it cool. Repeated running low/empty can cause them to go bad. I would suggest replacing the fuel filter (includes internal pressure regulator and is located above the rear axle) first and go from there. Let us know how things go for you!
2004 Columbia Edition WJ 4.7 HO
RB4/Moog HD Steering Stabilizer/PML trans pan 10304/OME 10MM Spacers/Bilstein shocks/Rubicon Moabs/255/65r17 Cooper Discoverer AT3/Factory chrome tow hooks/Mopar hitch & a loose nut behind the wheel