I have had fuel problems since i bought this truck. My question is: today i installed a holley red pump on the feed side of the fuel lines close to the tank. I have bypassed the selctor valve and i am only using front tank. The filter bowl doesnt seem to be staying full. I have not removed the mechanical full pump yet. It isnt leaking. Just wasnt pulling hard anymore it seems. Wen i turn on the electric pump the filter bowl fills with diesel wen truck isnt running. It is a very small solid stream of guel pumping into filter bowl. A stream no bigger than a pencil lead. My question is, could the mechanical pump be restricting flow and if so how do i remove it. I see 5 lines connected to the pump. One going under the filter housing, two steel lines going to the back of the heads and two line on top of the pump with ruber hose going to two stainless steel lines which seem to run back to the tank. What are all these lines and how do i bypass them? I have read about the block out plate but cant find anything about these fuel lines. Also. The little thing on the side of the filter housings with all the fuel lines coming into it. It also feed the filter bowl with fuel. What is that called and does it have a rebuild kit or diaframs inside of it that get clogged. Any suggestions help because i am lost at what to do. System is sealed everywhere. I checked everything for leaks.