Question about O2 sensor

T-Bone · Post by **T-Bone** » Fri Mar 31, 2006 6:11 am

If I were to get a weber carb for my tercel would I even need an O2 sensor? What does the the O2 sensor control anyway on a carbed engine?

Gasoline Fumes · Post by **Gasoline Fumes** » Fri Mar 31, 2006 9:54 pm

No, you won't need an O2 sensor anymore. The original feedback carb uses the O2 sensor to adjust the mixture. There actually is a simple computer in these cars above the glove compartment.

T-Bone · Post by **T-Bone** » Sat Apr 01, 2006 11:42 am

right now i have the stock carbs, i think my O2 sensor is bad. The car seems to still get good mpg. if i dont get a new one will that cause any problems in the future? is there anything that I can do to my stock carb so that it doesnt need to use the O2 sensor? in the next few months i hope to buy a weber carb for it.

Gasoline Fumes · Post by **Gasoline Fumes** » Sat Apr 01, 2006 10:21 pm

If the mpg is fine I wouldn't worry about the O2 sensor.

T-Bone · Post by **T-Bone** » Sat Apr 01, 2006 10:58 pm

what does the O2 sensor control on the carb?

takza · Post by **takza** » Sun Apr 02, 2006 5:41 am

It is supposed to fine tune the fuel mix....I replaced mine but saw no mpg gain. But then my EGR is non-functiioning due to a bad modulator. I'd get the EGR working right before I'd mess with the O2.

Chris · Post by **Chris** » Tue Apr 04, 2006 1:00 am

[what does the O2 sensor control on the carb?]

The O2 sensor sends a siganal to the CPU which sends a signal to the EBCV (Electronic Air Bleed Control Valve) The EBCV is mounted on the right fender near the vacuum switches A & B . It allows air to be introduced to the slow jet and the primary main nozzle well areas. It aids in leaning out the air/fuel ratio under certain conditions.