WOULD LIKE TO SEE IF ANYONE WITH ELECTRONICS EXPERIENCE CAN HELP
read about diode reducing ox sensor reading by about 500 mv which someone was using to fool post cat o2 sensors to get rid of check engine light
but i was thinking if i used the diode and then wired a 650-700 mv rechargable battery i could fool the computer to thinking the engine was always running a little rich
i haven t tried it yet , but it seems to make sense , just like when you wire two twelve volt batteries in line to get 24 volts
the battery i think would raise the voltage when the engine was lean , making it a little leaner and charge when the engine cycles to rich ,and also make it a think it was alittle richer
and if you wire in a bypass ( three way switch ) before the diode you would run stock , and after the diode you could run rich if you were trying to get somewhere fast , and use the battery to save gas
will someone with a little more technical knowledge please get back to me on this ,, if ther is something i am missing or need a special battery to keep it from overheating?
but i an pretty sure since the reading would only be off by 100mv or so it would not even make the light come on
On a related note, when I was looking for parts for my motorcycle, I noticed a wide band O2 sensor upgrade kit available for 2007 & up Harleys. What was intriguing about it was that it included a computer unit. You could program the computer unit for whatever fuel mix you wanted (up to 20:1 I believe), and when that target was reached it would report 14.7:1 to the vehicle's on board computer.
Here's a link to a low cost EFIE. I tried one a couple years ago, but it didn't seem to help any. I monitored the 02 signal using a DMM and all I saw was the ECU bringing the reading back the target voltage. The target voltage for the 02 sensor is in the .45-.50 range and it seems that adding the voltage to the reading didn't keep the ECU from adjusting it back to the target voltage. I also suspect if you added enough voltage that the ECU couldn't make the necessary corrections the 02 sensor reading would kick you into open loop operation. This was my experience on one of my cars, the results may be different for other vehicles.
the pcm will keep it running in what it thinks is that range
but if there is voltage of say 100 mv added you will only see it for a second or two , then the computer will lean the mixture and bring voltage back into range
only the fuel mix will be lean