Mines on two pumps an 044 that's fed from the tank that feeds my swirl pot over kill I know but I had two of them. Then a second 044 that's fed from the swirl pot and feeds the fuel rail. That pump will be changed for a better pump with my 650 engine. Each pump has its own live feed via its own relay. My afr gauge may not be anywhere near as good as workshop equipment but will give me a quick indication if there's a fuel problem.