O2 B1S1 & B2S1 off
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Teching In
Joined: Feb 2002
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From: Long Beach, CA
O2 B1S1 & B2S1 off on my WOT runs, my B1S1 averages 840mv and my B2S1 averages 910mv. I just replaced the O2 sensors figuring that would solve the problem but it hasn't. What should I specifically look for? a Exhaust leak on the passenger side? what else would cause that to happen? I'm stomped.
Thanks
Thanks
Thread Starter
Teching In
Joined: Feb 2002
Posts: 26
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From: Long Beach, CA
Re: O2 B1S1 & B2S1 off I'm not quite sure if they are the same distance or not. but here are the only pictures I found.
From the picture lt looks like it's only getting a reading from 2 cylinders instead of 4. That I think is a little wierd.
From the picture lt looks like it's only getting a reading from 2 cylinders instead of 4. That I think is a little wierd.
Re: O2 B1S1 & B2S1 off That would defiantly cause a difference in reading between your O2 sensors. O2 sensors are very dependant on temperature.
Having one O2 exposed to only 2 cylinders and the other exposed to 4 cylinders will generate two very different O2 sensor readings because the indicated temperature at the 4 point collection will be much higher than the 2 point collection.
It might not seem like it, but indicated temperature works like passing your hand over a candle. If you pass your hand over a candle very quickly you will hardly feel the flame. Imagine passing your hand over the candle repeatedly like a slow moving pendulum. It will be hot, but you will still be able to easily tolerate the heat. Now imagine passing your hand over the candle repeatedly very quickly. You will notice a significant increase in the amount of heat that you feel on your hand.
O2 sensors work the same way because temperature exits the cylider in pulses as the combusted charge leaves the cylinder. An O2 sensor exposed only to 2 cylinders will see half as many hot pulses (your hand passing not very frequently over the flame) as would an O2 sensor exposed to 4 cylinders (your hand passing very frequently over the flame).
Either way, I wouldn't sweat the split on your oxygen sensors.
Good Luck
Having one O2 exposed to only 2 cylinders and the other exposed to 4 cylinders will generate two very different O2 sensor readings because the indicated temperature at the 4 point collection will be much higher than the 2 point collection.
It might not seem like it, but indicated temperature works like passing your hand over a candle. If you pass your hand over a candle very quickly you will hardly feel the flame. Imagine passing your hand over the candle repeatedly like a slow moving pendulum. It will be hot, but you will still be able to easily tolerate the heat. Now imagine passing your hand over the candle repeatedly very quickly. You will notice a significant increase in the amount of heat that you feel on your hand.
O2 sensors work the same way because temperature exits the cylider in pulses as the combusted charge leaves the cylinder. An O2 sensor exposed only to 2 cylinders will see half as many hot pulses (your hand passing not very frequently over the flame) as would an O2 sensor exposed to 4 cylinders (your hand passing very frequently over the flame).
Either way, I wouldn't sweat the split on your oxygen sensors.
Good Luck
Thread Starter
Teching In
Joined: Feb 2002
Posts: 26
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From: Long Beach, CA
Re: O2 B1S1 & B2S1 off Well this week I started getting a misfire on cylinder #8 and found out that my spark plug & coil were bad so we replaced them. The car runs way better now and my O2's are very close to each other now. I guess I solved my problem. It's wierd how the car was not showing any signs of a bad plug or bad coil for a long time hmmm...
