06 Puma. Wema unit. Could someone explain the delima Im having here. Fuel gauge doesnt work. I take the sending unit out and slide magnet by hand and gauge works. I put sending unit in a glass picture with gas and magnet floats. I put it in a plastic cup with gas and it doesnt float. Why does it float in glass and not plastic thanks Chris. Does this 100% mean that I need a new sending unit?Last edited by cpcat on November 30th, 2014, 10:47 pm, edited 1 time in total.