I've got a little holley 2 bb with a electric fuel pump on my 1.3 sam. It runs great for about a hour after running at slow speeds it tends to load up, so much that it is flooding the carb and fuel is leaking onto the intake. I thought it might be the electric fuel pump so I bought a fuel pressure regulator but don't know what setting to try. Any suggestions? The strange thing is I can get on a road and drive it and the problem goes away!