I hate it when my posts don't take but ditto given the loose in the tank noise. Check out http://www.auerbach.ca/kj/lift_pump/ for a how to on dropping the tank which can and probably should be done when low but not empty. Also consider installing an in tank pump while you are in there.FYI as I've posted before erratic fuel level readings (not reaching full, later reaching fuel, inaccurate reading at low fuel levels - just generally cannot depend on gauge) can also be related to a going bad battery as stoutdog and I both know.