Got a new Holley 110 gph fuel pump that has the two lines in and out . Right now I have it plugged and it's not pumping. I think I need to pull the plug to vent it so it will pump. If it is plugged will that keep it from pumping? And if thats the problem do I just let it go? or turn it up? Or put a three line pump back on it? Ready to start after a few months of restoring and no gas to the carb. Help Steve