Removing CNG Low Pressure Fitting

Raise and support vehicle. Close quarter turn valve. Partially lower vehicle. Start and run engine in with ALT/GAS switch in ALT position until engine stalls or automatically switches to GAS mode. Disconnect negative battery cable. Raise vehicle again. Remove compuvalve shield. Slowly crack open compuvalve low-pressure fittings. Disconnect fittings and remove and discard copper washer seals. Disconnect low-pressure line at fuel pressure regulator. Remove and discard copper washer seal.