you have to cyphin the old gas out if you have a full tank but if you have a low tank put new gas in and plush it out and then you have your third option you have to unhook you gas line to drian you gas out which i think is the safest way possibleDO NOT DRIVE THE VEHICLE UN TILL EMPTY AND REFEULED
Filling your fuel tank will not make your car shake, unless you got some bad fuel that was contaminated with moisture.
sounds like the crankshaft sensor is bad
try checking your fuses
sounds like you got a bad fuel pump there bud
It can.
they got bad gas
bad ground
Battery? / Alternator? It's bad gas?
It starts running bad and changing the fuel fixes it.
Where is it stuck? on full or empty? if on full you got a bad ground, if empty you got a bad float.
sounds like you got bad gas, drain the gas and refill with new gas and also change the fuel filter and see what happens.
depend on what kind of car it is