You don't say if it does this sitting in driveway or just when driving. If in driveway then homer's idea will be easy. Hose from a gas can to pump inlet as a test. Can on the ground, stick hose down in thru mouth of red plastic 1 or 2 gal $9 gas container, no bulb necessary (bypasses all your system up to pump). This will isolate it a little.
causes:
1. Vacuum leak somewhere
2. Float level
3. Internal carb dirt
4. Gas cap not venting
5. Plugged filter somewhere
6. Bad new pump
and a bunch of other stuff, but first:
1. look down carb throat and see if gas is squirting into venturi. After is dies.
2. Seeing gas in the clear filter is not much help. Maybe it's flowing and maybe an optical conclusion.
3. Sounds like someone has been working on it recently (new pump,etc). Don't know history of this event.
4. Don't tear into carb until you hear from others and do various other easy tests.

One step at a time. As in: Check for vacuum leaks and observe squirt.

Does it idle forever but no acceleration? Won't idle? Won't start right back up? Info, info, info


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