MotorVac CarbonClean System II LE-1 - Manual (Page 25)

Overview
1998 MotorVac Technologies, xxiv
9. As shown in the figure below, connect one end of the loop adaptor (#060-2501) to the pressure
line coming from the vehicle's fuel tank. Connect the other end of the loop adaptor (#060-2501)
to the return line going back to the fuel tank. This forms a tank-to-tank loop, making it
unnecessary to disconnect the fuel pump.
10. As shown in the figure above, connect the output ( red ) hose from the unit to the adaptor on the
pressure line going into the fuel rail.
11. As shown on the previous page, connect the return ( black ) hose from the unit to the adaptor on
the return line coming from the fuel rail.
You are now ready to perform the PFI cleaning procedure.