Fuel and Refueling - Running Out of Fuel

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Running Out of Fuel

WARNING: Flow of fuel through a fuel pump nozzle can produce static electricity. This can cause a fire if you are filling an ungrounded fuel container.

Avoid running out of fuel because this situation may have an adverse effect on engine components.

If you have run out of fuel:

You may need to cycle the ignition from off to on several times after refueling to allow the fuel system to pump the fuel from the tank to the engine. On restarting, cranking time will take a few seconds longer than normal.With keyless ignition, just start the engine.Crank time will be longer than usual.
Normally, adding 1 gal (4 L) of fuel is enough to restart the engine. If the vehicle is out of fuel and on a steep grade, more than 1 gal (4 L) may be required.

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2019 Super Duty Owner's Manual