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.
19 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
hi i have a 1998 hyundia sonata auto 1997cc injection engine will i need a EFIE thank you
By keith on Nov 20, 2008
are you selling a efie for £30 including pp thank you
By keith on Nov 24, 2008
im interested in buying an efie but we dont know if it needs 2 efie’s or 1 as the vechile has two oxy sensors, my vechile is a 2.7 v6 dodge magnum 2005 so can you let me know and will you supply me with what i need as im going into fitting the systems in england, and can you give me a price for shipping heres my address in england so you can check for costings: dean bulman, 141 southcoates avenue, hull, humberside, england, hu9 3hf, thanks deans
By dean on Nov 26, 2008
I have been reading that a 4 wire O2 sensor does not work with a regular EFIE. I have read that if you find the pulsating wire going to the O2 sensor this is the wire to hook the EFIE unit to. Then I read that nothing works on a 4 wire O2 sensor. What is the truth about the 4 wire O2 sensor? Should I buy an adjustable EFIE that will totally by-pass the O2 sensor? I see one advertised that does such. I the EFIE is turned off things operate as normal but when the EFIE is turned on I set the the ohms and it operates off of the EFIE and not the O2 sensor.
Can you please reply by this E-mail for me I would appreciate it. As of now I do not know what the hell to do, EFIE,no EFIE or what.
Thanks
Richard Weaver
By Richrd Weaver on Nov 27, 2008
To Richrd, about the 4 wire O2 sensor. I have the same problem you have. I have a 2001 Toyota Camry with a 2.2L engine. I read if you have a 4 wire sensor there is one type that will still work. We have a wide band sensor. If it is classed as a Air Fuel sensor there is no such device on the market that I know of that works. If it is still called a O2 sensor you might get lucky with the products around. I’m thinking we might only be able to buy the O2 extender to place the sensor 3/4 of a inch back away from the pipe. I don’t like the idea if you don’t use the HHO generator.I still don’t know what to do? Some one please help us out…
By Jim on Dec 4, 2008
Hi, yes I agree is a problem to by pass the
sensores, yet I may be able to help.
I designe a digital controler that as tested on
menny cars, and so far so good.very easy to conect (3 wires) one switch that is on for savings, off to by pass to revert to standard.
more info? email fueleconomiser@telkonsa.net
regards
manny
By manny on Dec 25, 2008