Bosch 4&3wire sensor

[tom cloud]

>Hi in a 4 wire O2 sensor you have sensor gnd, earth, heater =ve, and
>signal
>in a 3 wire heated is it common ground, and there fore will it upset my
>autronic SMC if i use the chassis ground effectively for both for this
>function. if i then conect sensor ground to chassis will this upset
>things????
>
>have plenty of 3 wire ones free, 4 wire ones 350 dollars

4-wire sensor used on '91 F-150.  ~ $90 from Ford.  Found it
available on net for ~ $50.  I'll get name if you want it.


Tom Cloud <cloud at peaches.ph.utexas.edu>