Sudden shut off

I have a 2006 H2 Hummer.
It rand out of gas and turned off.
Then i poured in 10 gallons of
gasoline. I tried to turn it on and it
cranks normal but no start. It feel like
it is not picking up the fuel.
Could not find a Inertia switch so i
disconnected the battery over night.
Next morning, it started right up but
as soon as i accelerate, it turns off
again.
Then it wont start till minutes later as
normal but keeps turning off every
time i try to drive.
I notice that it wont start immediately
after shutting down but will about 20
minutes later. Like normal.
Can someone please give me some
tips ?