There's no manual valve you can simply flip to shut off the fuel. To stop fuel flow, you'd have to either:
* Turn the ignition switch to the "OFF" position. This is the most common and reliable way to stop fuel delivery.
* Disconnect the fuel pump relay (or fuse, depending on the specific configuration). This requires some mechanical knowledge and locating the correct relay/fuse in the under-hood fuse box. Warning: Incorrectly removing relays can cause problems with other vehicle systems.
Do not attempt to tamper with the high-pressure fuel system components yourself. They are under significant pressure and can cause serious injury if mishandled. If you're having fuel system issues, it's best to consult a qualified mechanic.
