I'm gonna be running new true dual exhaust on my TBI 350 S10, and I wanna know if I would benefit from a heated o2 sensor? How would I go about installing something like that.

nate

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1991 Chevrolet S10, 350 TBI/ TH350

 

Heated o2 sensor isn't any better unless you burn your own eproms to go into closed loop faster! A good o2 sensor from any parts store is fine. They're all at the same point in technology and you're not talking about a wideband o2 sensor so just get one from the local car parts or pep boys like me .
There isn't really a bad o2 sensor. If you want to go heated you can do a search and you'll get lots of info which I don't have infront of me right now. The heated o2 sensors come in 3 and 4 wire design, they're exactly the same but one of the wires on the 4 wire side is a sensor ground but if you are screwing the sensor in the y-pipe then it's already using it's body as a ground (in the 3 wire version). The other 2 wires are for another ground and positive ignition hookup for the heater element. Like I said before, don't waste money on a heated sensor if you don't change the go into closed loop faster. Even then it isn't always a good idea because the until the coolant temp reaches a certain temp the exhaust gas temp....well don't make me go on a tangent, just don't waste money on it .

 

My van originally had a heated O2 sensor in the Y-pipe and it made the ECM go ape$hit if you let it idle too long at start up. With the non-heated O2 sensor, my ECM never goes into closed loop unless I drive it. With the heated O2, I *think* it was trying to go into closed loop and the ECM didn't like that at all. It's prolly a matter of having some PROM parameters set right, but it runs almost perfect now, so I'm not gonna bother it.