Four wire O2 sensor source car?

[acazin at gold.interlog.com]

> Date:          Wed, 21 May 1997 03:30:40 -0400
> From:          Trevor Boicey <tboicey at brit.ca>
> Organization:  BRIT Inc.
> To:            "diy_efi at coulomb.eng.ohio-state.edu" <diy_efi at coulomb.eng.ohio-state.edu>
> Subject:       Four wire O2 sensor source car?
> Reply-to:      diy_efi at coulomb.eng.ohio-state.edu

> Is there a common junkyard car that has a heated
> oxygen sensor? I would like to snag one to use for simple
> experiments, and paying $50 for one isn't really my bag
> either.
> 
>   Ideally, I'd like to know a year range and car model that
> would be easy picking. Any ideas?
> 
>   Also, with heated oxygen sensors, is the heater current
> self limiting? Can I just hook it up to 12V switched and it
> will be fine, or do I need to control the heating current
> in any way? 
> 
>   As always, thanks.
> 
>
Ford cars had "allways" heated oxygen sensors, as many japaneses 
cars. 

On the car, the oxygen sensor heater receives power from the ignition 
key, therefore the voltage is anywhere from 9V to 16V, unregulated.

Alex Cazin