Oxygen sensors

[Nate]

On Fri, 4 Nov 1994, Andy Harrah wrote:

> The loading scheme to detect a warm sensor was from the days before they
> used self-heated sensors.  The Chevy manuals claim the sensors will cool
> off and the system will go open-loop during periods of extended idling.
> 

That's new to me, I used to sit and idle alot, and it didn't change it's 
reading, just when I made it rich / lean... hey this may be the "first" 
sensors used, these new ones are better etc...??