copy that. I have seen the eccentric on the end of the camshaft fall off or the bolt breaks and there is no mechanical means to move the fuel pump arm up and down. The easiest thing to do here is as mentioned above. Put a short hose on the suction side of the pump and the other end of the hose in some kind of container full of fuel. That will get you an answer right quick. You can count on that Keezyus.