Wideband O2 sensor placement
Thread Starter
TECH Apprentice
Joined: Jul 2008
Posts: 309
Likes: 1
Wideband O2 sensor placement First, what 0-5V O2 sensors do you HP tuner guys like most?
Second, where in the exhaust do you place them to get the best reading?
Third, how do you know when they go bad? Do you regularly replace them?
Second, where in the exhaust do you place them to get the best reading?
Third, how do you know when they go bad? Do you regularly replace them?
TECH Regular
Joined: Dec 2005
Posts: 437
Likes: 9
From: Indianapolis
1. I'm not getting into this one. There are all kinds of different widebands that will work and it depends on what you want (cheap,accurate,easy install, permanant or temporary mount). There is a thread a few pages back with a poll about the "best" wideband that is many pages long so another "best wideband" thread isn't needed, kinda turn into a flamewar after a while. It's pretty hard to go wrong with any of the widebands in that thread. Sorry but this question gets asked every week here so they usually go unanswered.
https://ls1tech.com/forums/pcm-diagn...sion-poll.html
https://ls1tech.com/forums/pcm-diagn...-wideband.html
2. This is another debatable question. Some say they like heat some say they like to not get too hot. I took the not so hot approach and put it back 5-10 inches from my narrowbands in the headers. If you have cats they need to be before them though. Just try to keep it mounted between 10 and 2 on the pipe to keep water/condensation off the sensor.
3. This depends on a few things. On a stockish car they can possibly last years unless you luck into a crap sensor or screw up the install. They are cut short when you run leaded fuel, run too hot, wire it wrong, or mount it to where water can get at it. My LC1 has lasted over a year now with no problems.
https://ls1tech.com/forums/pcm-diagn...sion-poll.html
https://ls1tech.com/forums/pcm-diagn...-wideband.html
2. This is another debatable question. Some say they like heat some say they like to not get too hot. I took the not so hot approach and put it back 5-10 inches from my narrowbands in the headers. If you have cats they need to be before them though. Just try to keep it mounted between 10 and 2 on the pipe to keep water/condensation off the sensor.
3. This depends on a few things. On a stockish car they can possibly last years unless you luck into a crap sensor or screw up the install. They are cut short when you run leaded fuel, run too hot, wire it wrong, or mount it to where water can get at it. My LC1 has lasted over a year now with no problems.
Last edited by 1987firechicken; May 15, 2009 at 08:43 PM.
Thread Starter
TECH Apprentice
Joined: Jul 2008
Posts: 309
Likes: 1
Thanks again for the links.
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I would move the wideband from one bank to the other. I don't see a need to run a wideband on both banks simultaneously.
I would be willing to bet that there is more variation of a/f from cylinder to cylinder than there is from bank to bank.
There is no reason to monitor both banks for anything other than diagnostic reasons.
If there is a serious problem from side to side you are going to know just from how the car runs.
If there is a serious problem from side to side you are going to know just from how the car runs.
