Apparently the 12A has an O2 sensor, either that or someone is making one for no apparent reason to me.





http://www.autopartswarehouse.com/mmp/mazd...nsor~parts.html



Thats just one of the numerous sites I have found with advertisements for 79-85 O2 sensors.





My question is where and why did they put one on a carbed car? Also what is the voltage reading on it, I would like to hook an AF gauge up to it to help on tuning if its just a standard O2 sensor. Any help would be appreciated!





-Shawn

79-85 12a's dont have em, the gsl-se does

[quote name='j9fd3s' date='Jun 22 2005, 11:47 PM']79-85 12a's dont have em, the gsl-se does


[/quote]





Ok so why are they selling O2 sensors for 79-85 12A motors on 20 or more websites?

[quote name='1revnrex' date='Jun 22 2005, 11:33 PM']Ok so why are they selling O2 sensors for 79-85 12A motors on 20 or more websites?


[/quote]

Mistakes on all of them?

didnt the 12a six port and 12a turbo have O2 sensors?

[quote name='Il RX8 lI' date='Jun 23 2005, 02:48 AM']Mistakes on all of them?


[/quote]





Good call! https://www.nopistons.com/forums/pub...1047683785.gif

[quote name='treceb' date='Jun 23 2005, 10:55 AM']didnt the 12a six port and 12a turbo have O2 sensors?


[/quote]





the turbo yah I could see that model having one but Im not sure on the 6 port. Im half tempted to torch a hole in my exhaust and weld a bung in it and just put a O2 sensor in it that way. I was just curious to see if there was one on my car I could use, I know the 12A has an ecu but it doesnt have anything to do with fuel mixture other than warmup enrichment I believe so I couldnt figure out why they would offer an O2 sensor for a carbed car https://www.nopistons.com/forums/pub...1047683561.gif

[quote name='1revnrex' date='Jun 23 2005, 09:43 AM']the turbo yah I could see that model having one but Im not sure on the 6 port. Im half tempted to torch a hole in my exhaust and weld a bung in it and just put a O2 sensor in it that way. I was just curious to see if there was one on my car I could use, I know the 12A has an ecu but it doesnt have anything to do with fuel mixture other than warmup enrichment I believe so I couldnt figure out why they would offer an O2 sensor for a carbed car https://www.nopistons.com/forums/pub...1047683561.gif


[/quote]



the 86-89b trucks and the 83-85 626's have a carb with a mixture solenoid, that is run by the o2 sensor, so mazda did it, just not on the rx7.