Hello, my name is Sean and I am having issues with the circuit I designed to regulate the amount of fuel my car is using. I will do my best to explain everything to you and anything you can tell me will be a great help.
First off, I have a 1994 Jeep Wrangler S 6cyl.
There is one oxygen sensor upstream (engine side) of the catalytic converter.
The engine is fuel injected.
The oxygen sensor has 4 wires. 2 white wires, 1 grey wire, and one black wire. I did testing on the black and grey wires to see which one was the signal wire, and surprisingly, the black one turned out to be it. I had assumed that the grey wire would be the signal, but when connecting the multimeter to it, i found that the grey wire was ground and the black was signal. I am attatching the device to the wires right next to the sensor.
In conjuction with the efie, I am using a homemade HHO generator as a fuel source in addition to gas.
Efie Wiring
(sorry for the lack of correct termonology, I am new to all of this and dont know specifics)
The O2 signal wire connects into the eife and into a single pole, ON-OFF-ON switch. One side of this switch goes directly to the ECU (to use the normal O2 sesor readings), and the other side of the switch goes through 2, 1.5 v AAA batteries. Then it goes to an ON-ON toggle switch. One side of the switch takes the now over 3 v charge to a potentiometer. A very small red LED is hooked up to the positive charge just before the potentiometer, and the negative side of the LED is attatched to a ground wire. After the Potentiometer, the charge goes back to the wire of the O2 sensor that takes it to the ECU. The other side of the toggle switch is the same exact thing. I did a toggle to have 2 different settings. Now the way the 4 grounds are connected, (2 potentiometers, 2 LEDs) , they all come together to one wire and this ground wire is connected to the same ground wire that the o2 sensor uses. The way the signal wires work (2 pot wires, 1 wire from the very first switch) They come together to 1 wire which connects back to the o2 sesor wire to take the charge back to the ECU.
Efie Problems
I think that the way I have my circuit wired is very wrong. When I install this system on my vehicle, I attatch a multimeter to the ground wire and to the signal wire going to the ECU to monitor the voltage. After the car is running warm, I read the settings and play around with it. When the original switch is flipped to the side that is supposed to use the orgininal o2 sensor readings, it does not do so at all, and the potentiometers still have an effect on the voltage. When the first switch is in the off position, there is still a voltage going to the computer, which is also still effected by the potentiometers. Also, i am having a very difficult time keeping the voltage of the output under .90, which is way to high to acutally use. Could all of these problems be due to the fact that i wired the ground wires all together before actually going to the o2 ground, and that i wired the signal wires together before goign to the ecu? I am very confused at this. I am very assured that there are no "stupid" mistakes like a touching wire or mismatched wire or anything like that. I just cannot figure out why it is not working for me.
I apologize if you are having trouble picturing exactly what is going on, please email me back for clarification on anything. any information you have that could help would be extremely appreciated.
Thanks A LOT,
Sean
First off, I have a 1994 Jeep Wrangler S 6cyl.
There is one oxygen sensor upstream (engine side) of the catalytic converter.
The engine is fuel injected.
The oxygen sensor has 4 wires. 2 white wires, 1 grey wire, and one black wire. I did testing on the black and grey wires to see which one was the signal wire, and surprisingly, the black one turned out to be it. I had assumed that the grey wire would be the signal, but when connecting the multimeter to it, i found that the grey wire was ground and the black was signal. I am attatching the device to the wires right next to the sensor.
In conjuction with the efie, I am using a homemade HHO generator as a fuel source in addition to gas.
Efie Wiring
(sorry for the lack of correct termonology, I am new to all of this and dont know specifics)
The O2 signal wire connects into the eife and into a single pole, ON-OFF-ON switch. One side of this switch goes directly to the ECU (to use the normal O2 sesor readings), and the other side of the switch goes through 2, 1.5 v AAA batteries. Then it goes to an ON-ON toggle switch. One side of the switch takes the now over 3 v charge to a potentiometer. A very small red LED is hooked up to the positive charge just before the potentiometer, and the negative side of the LED is attatched to a ground wire. After the Potentiometer, the charge goes back to the wire of the O2 sensor that takes it to the ECU. The other side of the toggle switch is the same exact thing. I did a toggle to have 2 different settings. Now the way the 4 grounds are connected, (2 potentiometers, 2 LEDs) , they all come together to one wire and this ground wire is connected to the same ground wire that the o2 sensor uses. The way the signal wires work (2 pot wires, 1 wire from the very first switch) They come together to 1 wire which connects back to the o2 sesor wire to take the charge back to the ECU.
Efie Problems
I think that the way I have my circuit wired is very wrong. When I install this system on my vehicle, I attatch a multimeter to the ground wire and to the signal wire going to the ECU to monitor the voltage. After the car is running warm, I read the settings and play around with it. When the original switch is flipped to the side that is supposed to use the orgininal o2 sensor readings, it does not do so at all, and the potentiometers still have an effect on the voltage. When the first switch is in the off position, there is still a voltage going to the computer, which is also still effected by the potentiometers. Also, i am having a very difficult time keeping the voltage of the output under .90, which is way to high to acutally use. Could all of these problems be due to the fact that i wired the ground wires all together before actually going to the o2 ground, and that i wired the signal wires together before goign to the ecu? I am very confused at this. I am very assured that there are no "stupid" mistakes like a touching wire or mismatched wire or anything like that. I just cannot figure out why it is not working for me.
I apologize if you are having trouble picturing exactly what is going on, please email me back for clarification on anything. any information you have that could help would be extremely appreciated.
Thanks A LOT,
Sean