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XfireZ51 · 07-04-2020

Just to be clear, you will not notice the issue I describe w Bosch O2s as u drive. It is not something that overtly causes a drivability issue. But it is something you can see as you are datalogging. The O2 signal would drop to 0mv on one side or the other. So the ECM would drop out of LEARN and go open loop at times.
I discussed w some tuning gurus, and was recommended to use AC instead. Have not experienced the O2 signal drop since. And there was a difference in the resulting VE map.

07-04-2020	#8
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Oxygen Sensor Just to be clear, you will not notice the issue I describe w Bosch O2s as u drive. It is not something that overtly causes a drivability issue. But it is something you can see as you are datalogging. The O2 signal would drop to 0mv on one side or the other. So the ECM would drop out of LEARN and go open loop at times. I discussed w some tuning gurus, and was recommended to use AC instead. Have not experienced the O2 signal drop since. And there was a difference in the resulting VE map.