Hello again! I found the culprit. I went all the way through the fuel line, and at the end there was a 3 inch rubber hose. Apparently the inner wall of the hose had come a loose and was working its way toward the fuel pump. It looked like an old piece of electrical tape. I could not believe it. Well at any rate, replaced the fuel line with at a brand new one. Pump and carb are working well.