1994 Chevy Blazer Ran out of gas, now won't start

I ran out of gas, but after walking to the gas station and putting two gallons in my tank, my '94 chevy s10 blazer still wouldn't start.
I can hear the fuel pump come on when I turn the key and I've tried letting that run a few times before trying to start, but still nothing.
It turns over just fine and will even start for a half a second every once and a while, but only to die right away.

Any ideas?
Thanks,
Wes