If you have three lines one goes to the fuel pump , one goes to the carbon canister , the last one which is a very small line goes to the fuel pump return line ( if you had a 2.3 ) for anti vapor lock , your carbon canister should be in the drivers side door , if it has not been removed, the line goes to the top of the fuel tank , (vent ) , the other line is the extra line on the fuel gauge sender ,