How Does The AFC Work?

The Auto Fuel Controller (AFC) makes our Fuelbox tanks legal in all 50 states for diesel pickups. The AFC system meets or exceeds all DOT & EPA regulations. We also meet the standards required by the VESC-22 

We make Auto Fuel Controllers (AFC) systems for all Ford, GM, and Dodge Ram diesel pickups. The AFC makes the operation of our auxiliary fuel tanks effortless. There’s no need to worry about switching between tanks and running out of fuel. Since our system transfers to the stock tank, there is NO CUTTING OF FACTORY FUEL LINES and warranty problems that go along with cutting up OEM lines and you will always be running off your factory fuel system.

The AFC computer works in conjunction with the Fuelbox by automatically filling your main tank as you drive, always using your truck’s fuel tank, no switching from tanks. The AFC monitors the stock OEM fuel tank. When the stock tank gets near ¼ of a tank it will turn on a transfer pump and transfer fuel from the auxiliary tank to the stock tank. The AFC will shut off the transfer pump when the stock tank is near full or the auxiliary tank is empty. The AFC can be set for automatic operation or it can be manually turned off from the cab of your truck. In addition to the auto and off, there is a timer mode, where you can manually transfer fuel for up to 4 minutes.

The Auto Fuel Controller has an LED screen to display the fuel level in our auxiliary fuel tank. The gauge can be attached on the dashboard of your pickup or anywhere in the cab with Velcro, no drilling necessary. 

Difference between Digital Display and Plug & Play AFC 

The Digital Display Auto Fuel Controller (AFC-DD) is a vehicle-specific controller and is programmed for the year and make of the vehicle. The controller will monitor the stock fuel tank level and will read the voltage on the stock sending unit, which knows when to turn the AFC pump on and off. The Plug & Play Auto Fuel Controller (AFC-PP) works with any diesel pickup 2008 to current, it plugs into the OBDII port on the pickup. The AFC-PP will monitor the stock fuel tank level directly from the truck’s computer, turning the pump on and off at the correct fuel levels. The AFC-PP controller shows the fuel level in both the vehicle tank and Fuelbox tank in percentage and the AFC-DD controller shows the fuel level in the Fuelbox tank only. Both systems have the same three modes; Auto, Timer, and Off. 

How Does The AFC Work?

Digital Display Auto Fuel Controller

How Does The AFC Work?

Plug and Play Auto Fuel Controller

Features & Benefits

  • Automatically fills your factory tank
  • Sleek black housing
  • Digital screen 
  • Many mounting options
  • Three Modes: Auto, Timer, Off
  • Easy installation
  • Meets or exceeds all DOT & EPA regulations
  • No cutting of factory fuel lines
  • No switching valves to fail
  • Always run off your factory system