I'm curious if anyone knows off of the top of their heads if an '05 Volvo Penta 8.1L EFI has a RETURN fuel line going (looping) back to the tank, from the injector rails. Or if the fuel line terminates at the injectors. I ask this because I'm interested in installing a fuel flow/volume transducer. It will only work on engines that only have a supply line, and not models with an actual LOOP. Any and all info would be greatly appreciated. -MV