The gas gadge is stuck on full why - Expedition Ford Cars & Trucks

Unplug connector from fuel pump at the tank check w/ohmmeter to see if have resistance on the connector going to pump in tank if no replace sending unit by dropping tank

Hi, The float on the gauge in the gas tank may be stuck in it's uppermost position ! Lift the blanking plate on top of the gas tank and check float freedom of movement ! Good Luck