02specvq

ok, so i bought a 91' 240 hatch about a month ago with stock ka in it.
it has ran fine until the other day...the fuel gauge messes up sometimes and i thought it had gas, then it starts spuddering and i look down and it is on Empty.
so i make to the gas station and put gas in it.
after this, it is still spuddering and wont rev pass 5k without cuttin out. i make it about 5 miles than it wont go any further.
i drag it home, cussing it the whole way. the next day it cranks up and idles but when i try to drive it, it does the same shit and dies.
it turns over and is firing, but not staying alive.
i put new plugs and fuel filter on it, and the fuel pump kicks on
can anyone come up with something it may be???
any help is appreciated, thanks