Jack-of-all-Trades, they are common to stick etc, but i doubt its your problem if you have no fuel.

Tell you one thing you could do, remove the fuel pump relay and bridge it so the pump runs continuously, and push the flap by hand and see if you can hear the injectors spray into the cylinders.

Also, have you checked to see if the flap moves when you are cranking the engine - if it doesnt you will have an air leak!