SKOT

Just rebuilt my 2150 2V carb in 1982 GT. For some reason fuel is puuring from the venturis after the vehicle is cut off.. I took the carb apart again and checked everything in the delivery system. Float, needle and seat, OK, power valve, gasket both in the valve and the housing, OK, no cracks in the carb body, or the power valve housing, no obstructions in any of the passages. Question...If there is a vacuum leak/loss to the source that holds the power valve closed, would that cause this flooding?? Im at loss for ideas

THanks Guys