RE: O2 sensor,was CFR engine

["Peter C." <nosimport@mailbag.com>]

1 wire unheated grounds thru case and exhaust pipe
2 wire unheated also but provides a "better" ground
3 wire adds the wire for the heater and the "better" ground
4 wire heated also available.... not sure why the extra wire
Peter C
At 04:15 PM 5/14/99 , Hanna, Mark wrote:
>Hi Ulix ,
>I've read about single wire , 2 wire , and 3 wire sensors . Can you
>enlighten us ? Are you mounting
>it in the down pipe because it is not a heated o2 sensor ? 
>Thanks ,
>            Mark Hanna
>            AN5L/13731