Volo FS2/FS3-HHO-Edition

  • Shipping Weight: 0.5lbs
  • Units in Stock: 17


The Volo FS2/FS3 Fuel Saver HHO Edition Circuit Only $98.00  (14 year tract record)

Can be used alone or with added HHO Hydroxy Gas™ and or Fuel Vaporizer. It is also the FS3 fuel saver with no added water gas of fumes, just stock. SAVE 10% to 25% with the Volo Performance circuit alone, add HHO and Fuel Vaporizing and go higher MPG gains. Now comes with a you solder in OBDII port plug in. Easy to solder 4 wires to your car/truck's OBD II port under the dash. It then becomes plug and play. Or you can use the 4 wire clip option below. Other wise will come with the OBD II port plug in. Works on 95% of the car and trucks out there. Even works on a few semi trucks. Volvo and Asian trucks. Only works on OBD II cars and trucks (1996 to 2023)


Today the FS2/HHO Edition and the FS3 ( no HHO or Fuel Vaporizer) are both the same circuit. Up to you, it you want to try out Hydroxy Gas™ (our 4x more powerful form of HHO gas, invented by a Dr. of AeroSpace Engineering : Bob Boyce™


This chip has been specifically tuned for the needs of HHO generator equipped vehicles. The FS2 is dynamic - which means the FS2 will consider oxygen levels in the exhaust, along with engine speed and load, intake air temperature and volume, and many other variables to determine the most efficient fuel delivery rate and timing at up to 256 separate load points. One year warranty.


When using HHO as a fuel supplement, the FS2 will adjust fuel delivery and timing to optimize efficiency. When HHO is disabled, the FS2 will automatically re-adjust and switch to highly efficient, non-HHO enhanced maps. The FS2 is a vehicle specific, custom programmed 20MHz Microcontroller. It utilizes its high speed serial input/output to communicate directly with the ECU through the OBD-II port.


Guaranteed to work or your money back!  One year warranty. This circuit works by an exclusive process of "Dynamic Soft-Flashing" the ECU. The new FS2- HHO Edition was specially designed to SAVE MPG with or with out the addition of Hydroxy® Gas from a HHO booster cell system. Ships in 1 to 2 days. We program the circuit to your specific make, year, model car or truck.  New B2 model with firmware version 7.6 (7/13) The led lights are positioned across the top, easier to see & a faster micro processor chip, higher hz. The next closet gas saving micro processor chip is $900! For only $89.95, the Volo FS2 circuit should be way more money$!

Save money at the pump! Pays for itself in 3 to 6 months. Only $98.00 No other fuel saving circuit on the market, as smart as the Volo Fs2 compares to this low price offer. The closest micro processor gas saver to the is $900+

How does it work?

The Volo FS2 & FS3 Chip works by an exclusive process of Dynamic Soft-Flashing the ECU, onto it's own micro processor chip.
Each circuit comes programmed with a highly tuned map and a set of EPROM addresses that directly affect fuel efficiency. When the ECU attempts to read the specific EPROM address, the Volo Chip patches the factory value with one from its tuned map.
Built on the same platform as our popular VP12, the FS2 utilizes the same exclusive patching algorithms to increase fuel efficiency across the map by up to approx. 10% to 18%.

Volo FS2-HHO-Edition • FS3 • VP12 .pdf  Wire clips or solder 4 wires

Volo OBD II Install / Solder instructions 2023 OBD II Port solder job.

Either use the provided OBD II port plug or use the 4 wire clip option below. Only 4 wires, behind the OBD II port under your dash, takes about 20 minutes to install. Solder or use the provider wire clips. Locate the OBD-II port, find the car or trucks protocol. Instructions here. The Volo install leaves your OBD II port open for any plug in tool or ScanGauge device, if you use the wire clips or solder in 4 wires.

ATTENTION INTERNATIONAL CUSTOMERS : Please verify your vehicle is OBD-II compliant before making a purchase. (1996 - 2022)

HHO enthusiasts swear by our time tested FS1. After the recent 7.0 patch, we've come close to the limitations of the FS1's hardware. So we've taken your feedback and suggestions, along with the powerful VP12 hardware, to build the newest in the Volo line up - The FS2-HHO Edition!

Learn about all the scam resistor chips here.

Don't want to bother with a Hydrogen Generator? but still want to save gas, Volo makes a FS3 chip.

Recommended modifications :

- K&N or equivalent non-restrictive intake, but with adding HHO to air filter box, the stock air filter box is recommended. The cone shapd air filters are no good with HHO installs, unless the K&N has a long tube before their air filter, as to let the HHO gas mix with the incoming air. Our Static cling spin state of HHO has to mix with the incoming air, before hitting the intake manifold. The more mixing the better!
- HHO (Hydroxy® Gas) Supplement Generator for maximum gains. Beware of Junk HHO cells out there. We can prove that our cells will produce a good 80% of "ortho" hydrogen, a necessary static cling gas to carbon. Without this higher quality gas that clings to carbon,  you will NOT see consistant MPG gains! Please read here.

The FS2 is compatible with factory equipped Turbo/Superchargers, diesel engines, Flex-Fuel, & HHO supplement systems. It is NOT compatible with hybrid engine options, propane, or natural-gas.

We need your Year, Make, Model, Liter size engine information for the programming of your specific car or truck

The FS2 has room for up to 8 performance maps, which we use to cover different engine options for a particular vehicle. For example, the 1999 Ford Mustang Volo Chip will be compatible with both the 3.8L V6 and the 4.6L V8. The FS2 will read the first few bytes of data from your ECU during calibration to determine which map to use.



Volo FS2 video install.

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This product was added to our catalog on Friday 12 February, 2016.

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