To relieve the pressure in the system, first find the fuel pump relay plug, located on the cowl, as specified in the applicable Electric Fuel Pump Pressure Checking procedure. Unplug the relay, leaving it in a safe position where the connections cannot ground. If necessary, tape the plug in place or tape over the connector prongs with electrical tape. Then, start the engine and operate it until it stalls. Crank the engine for 10 seconds after it stalls to remove any residual pressure.