Your Simple o2 Explained
1) Knob = O2 sensor enhancer. Fully clockwise will be the lowest factory setting. Turning the knob right will lean out the car.
2) Switch= Turns on o2 sensor voltage adder circuit
Knob colors may vary depending on supply. If you want a particular color then radio shack has a nice selection.
Black = Negative terminal on your battery. NOT chassis ground. Hook this directly to your negative terminal for best results.
Red = Switched 12 volts. Can be from your hydrogen generator positive connection so it powers on when your hydrogen does. Any 12 volt supply that comes on when your car does is fine.
O2 sensor wire This wire goes to your o2 sensor signal wire. This may be red, blue, green, yellow, white or black if there are two red or two black wires on your box the o2 wire will always be the wire with the knot or tag. Make note of this wire as it is one of the most important wires on your device.
Test probe ports on device wires = Black is ground and red is o2 signal wire voltage. This makes tuning your o2 enhancer a breeze!
INSTALLING AND SETTING THE O2 SENSOR ENHANCER
The standard narrow band o2 sensor works like this. As it senses how much oxygen in your exhaust and it emits a pulsing voltage from .00 – .09 volts… or 0-900 millivolts. As your engine burns cleaner the oxygen count goes up and that makes the voltage output of your 02 sensor go down. When this happens your computer starts to think it needs to dump more fuel to run richer. The ideal setting is about 450 millivolts This adder will simply allow you add a couple hundred millivolts to your 02 signal line to help keep the computer from going into that full rich mode.
You will need to find your oxygen sensor signal wire. There are many different kinds of o2 sensor configurations. If you have one wire then this part is easy… if you have multiple wires then you should be able to find the right one using your multimeter. So long as your vehicle uses a narrow band voltage based o2 sensor then it is easy to find. It will be the one with the fluctuating voltage lower than 1 volt. That is the wire we want to modify.
DO NOT CUT the o2 signal wire! Just strip back a little of the casing to expose some wire… or use a crimp tap connector of you like.
Now connect the o2 signal wire coming out of your new controller box directly to the o2 sensor signal wire you have just located.
Make sure you start with your right knob turned all the way CLOCKWISE for its lowest voltage. There are two test ports for you to stick you multimeter probes into for tuning. With your car running and your hydrogen on… see what the voltage reads. You should see it bouncing up and down from low to high. Now turn on your o2 adder by flipping the switch to the on position. You should see it increase a little and keep bouncing around up and down. We want to keep it in a target range of about 450 millivolts to keep the computer happy. So long as you see it bouncing up to about 450 you should stay out of the gas wasting zone. Some people find the best results by only adding about 200 millivolts.. others can push closer to 800 millivolts to push the limits of lean mixture.
At the lowest setting this device may output 200-300 millivolts and may be just right. This depends on your particular vehicle. Since it is designed to be used with our hydrogen generators, we often find that the lowest setting is just right about 30% of the time. On some vehicle the lowest setting will be much lower.
When adding voltage to your o2 sensors we ONLY need to modify the one before the catalytic converter. They are the only ones that count in most cars 96 and up. On older cars with only ONE o2 sensor then obviously you connect to that one.
IMPORTANT On some vehicles the o2 circuit voltage starts out at about 1.8 volts and drops to normal in about 60 seconds. If this causes strange idle at start up then we have found it best to wait a minute after you start the car to turn on the o2 adder circuit. Usually this causes no noticeable startup issues and we leave the switch on at all times.
When dealing with multiple o2 sensors simply run a wire to BOTH o2 sensor signal wires from the o2 output wire on your controller. Just start by adding a couple hundred millivolts and gradually go up from there until you car seems to balance out. Remember the o2 wire will be the one with the knots or tag. There is no need for 2 separate devices to run 2 o2 sensors. The voltage regulator in the “Simple O2″ is ready to run more o2 sensors than you could ever use.
Find your ideal setting on the o2 side then just leave it alone! To return your o2 sensor to stock just turn the device off!
It may take you a little bit to tune in your ideal voltage but be patient and once you find it then leave it alone. You may find that as you adjust it just way up or way down. The trick is to barely turn the knob. Use teeny tiny movements to find the proper range. Don’t just crank it up as it can go up to 4.5 volts so never turn it all the way up!
One recent set of road tests (6-16-07) averaged 52.4% better mileage. But tests from a week earlier on the same car averaged only 24.5%. Actually 22% if you count out idling. WHY such great difference?
The secret of the BIG DIFFERENCE between the two test groups: The later and more successful one got MORE THAN DOUBLE average gain, was because the MPG was not dialed to near choke point. It was about ¼ turn closer to factory setting! On the earlier tests I was choking the engine half to death. It reminds me of the greedy guy slaying the gold laying hen to get all the gold right now…
Don’t overwork the engine by leaning it too much – play around until you find the PERFECT BALANCE point. Leave it there at its best position.
This is a proven device that can help keep your cars ECU seeing the proper voltage range.