O2 sensor oscillations

[mrvette]

Bill the arcstarter wrote:
> 
> OK, Here's a question:
>  I read that, while in closed loop - the voltage on the O2 sensor is
> supposed to cross 0.45 at some particular rate.
> 
>  Are these crossings producted by "puffs" of exhaust going across, or is
> the ECU intentionally running lean-rich-lean-rich-lean in order to keep
> the avg mix (over time) "centered" on the ideal?
> 
> Thanks!
> -Bill
> 
> _

The latter statement is correct,  it is a constant 'conversation'  GENE 


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