Ever time I use rear fuel tank truck runs good when switch it to the front fuel tank drives horrible..I have empty the fuel and replace with new fuel ..also changed fuel bowl filter.. still not it? Any advice will be appreciated

 

If,,,,,,,,,,,.,.,the fuel line from the front tank is allowing air to get into the fuel supply that could be a possibility. We would usually install a sight glass in the line from the tanks to the fuel pump and watch for any air bubbles in the glass. If we do see air bibbles ,then we need to carefully check the connections and lines to the engine from the front tank.