Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - cars with wide band o2 sensors for my lean burn conversion

saand · 12-29-2010, 07:50 PM

kamesama980 thanks for the info,
regarding the wide band o2 sensor circuit, my ECU is a stock ECU so it will only take in the narrow band sensor input however i am an electronic engineer so i will not have any trouble making up a circuit to deal with the wide band sensor, i planned to set the air fuel ratio on the circuit i make so i can set it lean or stoic then the ECU will just see the normal sensor input and attempt to compensate.

I went to the wreckers yesterday and i didn't find any wide band sensors at least of the 5 or 6 wire configuration. I saw plenty of 4 wire sensors but without knowing the info on them they could and would likely be just a standard sensor with a heater.

I am trying not to spend $50 on a o2 sensor because if it saves maybe 5% it will take several years to get the payback on that.

So i am going to experiment with how lean i can make my car using the narrow band sensor, i am going to make a circuit that will make the car try to control the air fuel ratio so the o2 sensor is outputting say 0.05v rather than 0.45v. I unfortunately cant find a datasheet on the o2 sensor i have or even a generic that has voltage output to air fuel ratio but i figure ill see the results on my fuel meter and see how it goes.

12-29-2010, 07:50 PM	#6 (permalink)
saand Wiki Writer Join Date: Jul 2010 Location: Melbourne, Australia Posts: 236 bugler - '91 Mazda 626 90 day: 35.89 mpg (US) Thanks: 15 Thanked 25 Times in 22 Posts	kamesama980 thanks for the info, regarding the wide band o2 sensor circuit, my ECU is a stock ECU so it will only take in the narrow band sensor input however i am an electronic engineer so i will not have any trouble making up a circuit to deal with the wide band sensor, i planned to set the air fuel ratio on the circuit i make so i can set it lean or stoic then the ECU will just see the normal sensor input and attempt to compensate. I went to the wreckers yesterday and i didn't find any wide band sensors at least of the 5 or 6 wire configuration. I saw plenty of 4 wire sensors but without knowing the info on them they could and would likely be just a standard sensor with a heater. I am trying not to spend $50 on a o2 sensor because if it saves maybe 5% it will take several years to get the payback on that. So i am going to experiment with how lean i can make my car using the narrow band sensor, i am going to make a circuit that will make the car try to control the air fuel ratio so the o2 sensor is outputting say 0.05v rather than 0.45v. I unfortunately cant find a datasheet on the o2 sensor i have or even a generic that has voltage output to air fuel ratio but i figure ill see the results on my fuel meter and see how it goes.