Without Fuel Pressure Gauge

If fuel pressure gauge is not available, disconnect Inertia Fuel Shutoff (IFS) switch. For IFS location, see INERTIA FUEL SHUTOFF SWITCH LOCATION (CARS)  or INERTIA FUEL SHUTOFF SWITCH LOCATION (TRUCKS & VANS)  under ENGINE SENSORS & SWITCHES. Remove fuel cap to release fuel tank pressure. Crank engine for 15 seconds to release system pressure.