Ox sensor duty

[Brett Dikeman]

At 6:26 PM -0400 6/21/04, Huw Powell wrote:
>>i had it in mind it should cycle more quickly..once a
>>second?
>
>naw, that's typical for idle.  It might cycle faster at higher rpms, 
>but basically all it's doing is going a tiny bit rich/tiny bit lean, 
>and never getting far enough from stoich. to matter.

This is actually done on purpose; it is designed to make 3-way 
converters "work"...they're designed to be loaded one way then loaded 
the other.  Rich exhaust mixture allows the cat to process NO; lean 
allows it to process unburned hydrocarbons and carbon monoxide.

Brett
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