Fuel Pump
Fuel is supplied by an electric fuel pump. Fuel pump is located on driver's side frame rail. Fuel is drawn from fuel tank through the primary filter (screen on fuel tank sending unit) by electric fuel pump. See Fig 1. Pressurized fuel, about 45-80 psi (310-552 kPa) is supplied to secondary filter located in fuel filter housing on top of engine by means of electric fuel pump and pressure regulator valve. Pressure regulator relieves fuel pressure by sending fuel back to fuel tank. Only filtered fuel going through fuel filter will go to cylinder heads. A fuel check valve is located on each cylinder head to prevent fuel pressure spikes in fuel rail.