To completely stop fuel flow, you'd need to either:
* Disconnect the fuel pump relay: This requires some mechanical skill and knowledge of your car's electrical system. The location of the relay varies depending on the specific engine and trim level. You'll need to consult your owner's manual or a repair manual to find it.
* Disconnect the fuel pump fuse: Similar to the relay, finding the correct fuse requires your owner's manual or a repair manual.
* Disconnecting the battery cables: This is the easiest and safest method for a non-mechanic to quickly stop fuel delivery. It will, however, also disable everything else electrical in the car.
Important: Always consult your owner's manual for specific location details of fuses and relays. Incorrectly working on your car's electrical system can be dangerous. If you're not comfortable with these tasks, seek the assistance of a qualified mechanic.