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Volo FS2-HHO ECM Performance Enhancer

(for OBD II and CAN computers)

Volo "No Longer Makes several models of Performance Enhancers.

The FS3 has been specifically tuned for the needs of non-HHO equipped vehicles that want performance increases that will increase fuel efficiency.

The FS2-HHO has been specifically tuned for the needs of HHO generator equipped vehicles.
Both are dynamic - which means they 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.

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 vehicles' OBD-II port.

Note:  According to Kevin, at Volo Sales and Support, :"Unlike ECU ROM chip replacements or permanent ECU flashing, the Volo Chip makes no changes to the ROM itself and does not require opening the ECU. It will not void your factory warranty."

Learn more and order from Volo's web-site

From Kevin, Volo support:

"I do apologize about the original delayed response, most emails are answered same day or next day. E-mails are typically answered on the weekday during normal business hours.  Occasionally we have extra inquiries that put us behind. Some e-mails require more research than others.  If the matter is urgent, you can give us a call on our help line. Our number is 1-800-580-5417 from 10am-3pm CST. If we do not answer we may be on the other line, please give us a call back.  You may post this number if someone needs to contact us. "




I installed the Volo FS2.1-HHO chip in my 2001 Ford Taurus Station Wagon. Right out of the gate, I noticed a performance increase. It led to better fuel efficiency. So, I started a web page to keep track of the progress I am making. Thus far I have improved my mpg to 25% City, 23% Highway, and 31.5% Combined; without using HHO.

David B., Mansfield, Ohio  


I finally got a Volo Chip and installed it on my Tacoma. It initialized and fired right up. Early indications are that it is going to make a tremendous improvement in gas mileage. I will keep you informed…


Don K., Orlando, Florida










Page Last Edited - 04/03/2022

    Copyright © 2003   All rights reserved.   Revised: 04/03/22.                                             Web Author, David Biggs
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