DIYEFI.org Forum

Does anyone have experience introducing a little HHO (Hydrogen+Oxygen) into the air intake? I have been experimenting with this, and it works... but my ECU fights me.

The HHO is introduced through the air intake (easy) ... and helps the fuel mix burn 100% clean ... BUT the O2 sensor tells the ECU that I'm "running lean" and MORE fuel is enjected to compensate for the clean burn.

I need to somehow manage this through a piggy-back device in front of the ECU and behind the sensors... or with a replacement ECU.

Anyone have any suggestions?

HODPOD, Atlanta

This is not what you want to hear but my suggestion is for you to get rid of this so-called HHO setup and start learning (more?) about physics. You also need to learn how an O2 sensor works.

Jean

I'm also a browns gas skeptic, however, I do see a potential for a cleaner burn, and perhaps an increase in efficiency. So even though I'm a skeptic, I do see some potential.

Some ways to trick your current ECU, relative to the O2 sensors include adding a diode for a voltage drop. I seem to recall running lean means more O then expected, so a higher O2 reading. I seem to recall a germanium diode drops about .3v. So you could drop the V by adding a diode. Another way that would allow some adjust-ability would be to use an op-amp as a non-inverting amplifier. Adjusting the gain would allow some warping of the signal.

Most ECU's have some form of a "limp home" mode. If you simply disconnect the sensor it will likely ignore the signal, and work off of an ideal value. Granted this makes it open-loop, but would allow intake modifications to actually work.

http://diyefi.org/forum/viewtopic.php?f=15&t=324

Sorry man :-)

Fred.