My 96 Contour has two fuel lines since fuel delivery "returns" to the gas tank . This means one line provides fuel to the injectors and the other returns it to the tank. As far as I know when it comes to injectors the bank 1/2 grouping doesn't exist. So I'm guessing the mechanic did the injector cleaning correctly. I'm a little curious though, was the car solely fueled by the injector cleaning solution? I guess this is possible, but I thought a tee connector was used to feed both fuel and solution to the injectors. If the car was only fueled by the solution then gas would come shooting out of the open fuel line and solution that didn't get squirted out of injectors would make it's way back to gas tank.
