I think you are correct. maybe the fuel pump didn't come on when you first started to go down your driveway, you just used to rest of fuel that was in the rail and lines. A good way to check for the pump working is to hear it energize(sounds like a hum in the tank) when you turn the key on. If not, then check for power to the pump, or you can just use a rubber mallet and hit on the bottom of the tank as someone tries to start it. Jeep doesn't have a shut off switch, sorry on that one. Removing the tank is easy, i don't think you need to raise the it at all.
92 YJ Red
Bestop Halftop, VDP sound wedges, Body lift
2 inch shackles, 33" Firestone Destination M/T