Holley 670 street avenger problem

If the pump works off the carb but not on, i'd look at the plastic pump cam on the throttle lever and make sure it hasn't come loose or cracked? Also, make sure the lever hasn't come out of adjustment. Does the bowl look clean inside? Could a piece of trash gotten into the squirter and blocked it. One other thing, make sure the hole in the bowl gasket is lined up with the transfer port on the metering block.