Electronic Fuel Injection Enhancers (EFIE) and HHO
Announcement – 3:19 pmIn the past, fuel savers would not work when applied to fuel injection because those systems are actually designed to prevent efficient combustion. Adding an HHO kit to your engine’s air-intake increases the combustion efficiency. In order to get the most MPG gains from the HHO kit, the oxygen sensor’s voltage needs to be externally regulated. This is because the vehicle’s factory computer does not know how to deal with the addition of HHO / Brown’s gas in the air intake system.
Increasing the combustion efficiency of an engine increases the exhaust oxygen percentage. Most fuel injection engines use an oxygen sensor to infer the air/fuel ratio of the engine, the increased oxygen content in the exhaust is ‘read’ by the computer to be a lean mixture in the engine. The computer then adds extra fuel to bring the pollution back to ‘normal’.
This problem led to the development of the Electronic Fuel Injection Enhancer (EFIE, pronounced Ee-Fy). The EFIE allows you to apply an offset to the voltage coming from the oxygen sensor, so your vehicle’s computer is completely unaware that the oxygen content of the exhaust has increased.
Only the O2 sensors in front of the catalytic converter should need the EFIE device as the ones behind the catalytic converter are there to make sure the one’s in front are doing their job.
More about HHO: The H2 and O being pumped into the system will react with themselves and then the additional oxygen being pumped in will react with the gasoline. However, since the H2 and O combust more efficiently, it will also increase the efficiency of the gasoline being burned resulting in more oxygen exiting your cylinder and thus making your catalytic converter work less.
How EFIE’s work:
The oxygen sensor “tells” the computer what the oxygen content is by providing a voltage on it’s signal wire between 0 and 1 volt. 450 millivolts (.45 volts) means that the fuel/air mixture is correct. Higher values means the mix is rich (has too much gas), and lower voltages means the mix is lean. By adding voltage to the sensor’s output, we can compensate for the additional oxygen in the exhaust.
The Electronic Fuel Injection Enhancer (EFIE) does exactly this. It adds a floating voltage to the top of whatever the oxygen sensor is putting out. It has an adjustment that allows you to control, to within a few millivolts, the amount of this added voltage. This allows the computer to be unaware of the additional oxygen content of the exhaust from the HHO generator, and the electrolyzer can now achieve it’s full potential in fuel savings.
Most cars have oxygen sensors both before and after the catalytic converter. The ones downstream from the converter do not need to be treated. Their data is used to determine when the converter has gone bad, but are not used in the air/fuel calculations. EFIEs are only needed for all upstream oxygen sensors.
Where to Purchase
There are kits/instructions available from sites that will tell you how to make your own EFIE, but if you don’t have time or the skill to make one there are stores that sell already build EFIEs. If you have purchased an HHO kit or are considering it for a fuel injected vehicle, go to EFIE Devices, to get an already assembled EFIE device.
13 Responses to “Electronic Fuel Injection Enhancers (EFIE) and HHO”
I sent you an email and it bounced back.
Raul
By Raul Trevino on May 14, 2008
1992 toyota 22-RE EFI- CAn i make a HHO enhancer for my pickup?Oxygen sensor has 4 wires?i have a HHO generator already.
Thanks
By luciano on May 29, 2008
There might be a way to bypass the o2 generator or try getting an EFIE device from the link in the article.. Different cars have different sensors, but the folks that make the premade EFIEs should be able to help.
The sensors only work effectively when heated to approximately 800°C, so most newer lambda probes have heating elements encased in the ceramic to bring the ceramic tip up to temperature quickly when the exhaust is cold. The probe typically has four wires attached to it: two for the lambda output, and two for the heater power, although some automakers use a common ground for the sensor element and heaters, resulting in three wires. Earlier non-electrically-heated sensors had one or two wires.
By Jermy Johnson on Jun 17, 2008
What happens if you forgo the EFIE kit and simply pull the fuses on the MAP oxygen sensors (in my Saturn, one in the exhaust manifold and the other aft of the catalytic converter)? Will that disable them and allow the HHO to to get mileage gains? Or do the reactant metals in the sensors run independently of the car’s computer?
By Joe Shea on Jul 7, 2008
if you pull the fuses your ecu or computer will guess that the units are damaged and will add more fuel or make it run richer in order to keep you from running to lean and burning your valves.
By rich carter on Jul 30, 2008
To the person with the 1992 Toyota pickup. I have the same style p.u., you will find the 4 wires from your sensor are Brown, Black, Pink/with blue, and White/with red. The brown is the signal lead and runs between 1 and 9 Millivolts. Youll find the sensor just ahead of the catalytic converter on top of the exhaust pipe. I wrapped the inside part of the sensor with tinfoil to reduce the amount of oxygen it senced. When I installed my HHO generator and water vaporizer, and ran the system I found a voltage of 5 millivolts being produced, which is about perfect for your engine computer. The wires run inside a loom on the passenger side of the engine. You can do your testing at this location. Mine runs pretty nicely this way. Good luck to you, Gary
By Gary on Aug 18, 2008
Does the 2004 CL500 need an EFIE with HHO generator?
By Mark on Sep 9, 2008
i have a 1987 cadillac seville and i inatalled a kit for hho that i assembled and hooked it up without any enhancers and i tested it for making hydrogrn and it din not increase my mileage.so what would be the problem
By lincoln sexton on Sep 17, 2008
i have a 1987 cadillac seville and i installed a kit for hho that i assembled and hooked it up without any enhancers and i tested it for making hydrogrn and it did not increase my mileage.so what would be the problem
By lincoln sexton on Sep 17, 2008