Quick question on O2 sensor readings
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Teching In
Joined: Mar 2019
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Quick question on O2 sensor readings I am an auto shop teacher and we did an LS swap in a 92 Olds Custom Cruiser using a converted truck harness. The O2 sensors stay about flat in the middle whether hooked up or not. Does the signal need to be boosted possibly?
if it's a steady .5V, i think what you're seeing is a reference voltage from the ECM. if you see that constantly, IIRC it basically means the signal wires from the o2 sensors are really not connected. I would go back and check the harness for breaks or to see if it's wired correctly.
TECH Fanatic
Joined: Dec 2017
Posts: 1,468
Likes: 266
From: Bossier City, Louisiana
I don't know your name but you are an absolute gem for the high school you work at. There are so many things that can be learned from doing an LS swap and our schools sorely need courses like yours - project management, electronics, welding, mechanic training, computers, pollution control, air conditioning, sheet metal and body work. Not everybody is university material and we need other skills in this country just as badly.
If we ever met, I'd buy you lunch in the fanciest restaurant in your town. I graduated HS in 1977 and I can still remember every shop teacher I ever had. I learned more from Mr Leach, Mr Still, Mr Barrett and Mr Mattingly than just about any other teacher I ever had.
I salute you, Sir!! And hey . . . wagons are cool, too!!!
Rick
If we ever met, I'd buy you lunch in the fanciest restaurant in your town. I graduated HS in 1977 and I can still remember every shop teacher I ever had. I learned more from Mr Leach, Mr Still, Mr Barrett and Mr Mattingly than just about any other teacher I ever had.
I salute you, Sir!! And hey . . . wagons are cool, too!!!
Rick
TECH Fanatic
Joined: Dec 2017
Posts: 1,468
Likes: 266
From: Bossier City, Louisiana
Hello Again Mr Shop Teacher,
If you have a Pay Pal account, please PM me and I will send a Benjamin your way. I'm sure that you can find something that station wagon needs. My wife is a HS math teacher and I deeply sympathize with your needs and the likelihood that you spend out of pocket for your class. While I admire your principal and your school board, my guess is that they don't adequately fund your class.
And hey - WE WANT PICTURES!! This site salivates for pictures!!
Rick
If you have a Pay Pal account, please PM me and I will send a Benjamin your way. I'm sure that you can find something that station wagon needs. My wife is a HS math teacher and I deeply sympathize with your needs and the likelihood that you spend out of pocket for your class. While I admire your principal and your school board, my guess is that they don't adequately fund your class.
And hey - WE WANT PICTURES!! This site salivates for pictures!!
Rick
Depending on the year of the truck, GM used 2 different type sensors that were grounded differently. One is called "case grounded" and I can't remember what the other one is called. I ran into this a couple weeks ago. If you use the wrong sensor it will show 450mv all the time because the sensors are wired differently at the connector.
