Poor mans EFIE?

[sportcoupe]

I found this alternative, cheap and easy to make circuit to alter the O2 sensor signal compared to a full EFIE device. It was buried in chapter10.pdf, I cannot find any more information on it. Can anyone provide feedback on it?


"An alternative: As the signal coming from the oxygen sensor to the vehicle?s ECU fuel computer needs to be raised slightly to allow for the much cleaner exhaust produced when a booster is being used, an alternative solution has been suggested and tested. The idea is to add a small, adjustable voltage to the signal already coming from the oxygen sensor. This voltage can be from a single ?dry-cell? battery and adjusted with a variable resistor.



The circuit shown here allows a voltage anywhere from zero to 0.5 volts to be added to the oxygen sensor signal. This must not be done unless a booster is running. Using it without a booster is liable to lead to engine overheating and possible valve damage. This, of course, applies to the previous oxygen sensor signal adjusting circuit as well."

[sportcoupe]

Judging by no responses I assume no one has used this circuit to adjust their O2 sensor. I assume this is because this cheap circuit does not work.

[atlantex]

If the circute is functioning as described, then it will work in a car but leaner fuel will head up the whole engine, so you have to use
a additional cooling option, like a water bubbler.


you can read some basics about cheating the lambda-carcomputer system

http://better-mileage.com/memberadx.html


atlantex

[lapperll]

I also found a O2 altering devise similar to the one you have posted.  The Mad Scientist HHO Research has a series of three videos on U-Tube where he builds and tests the unit. I haven't tried to build one yet, but it seams like it works. 

Hope this helps,


http://www.youtube.com/watch?v=jgHJDD6UK0A


Lapperll

[innovation_station]

i just built this and it does what it is suspoto 

i have not installed it yet tho

ist