What kind of o2 sensor is this Options

[6gsillyca]

Can anybody tell me what kind of oxygen sensor this is, and what type of car/engine it is used for?

I have a 98 celica chassis with a jdm 93 sw20 3sgte swapped in. I ordered a replacement o2 sensor for a 93 mr2t, figuring the ecu would need a 93 3sgte sensor.

Well my replacement sensor has 4 wires, and the clip has 4 electrical contacts. The one currently installed has 1 wire w/ 1 contact. I searched online, but it looks like the 5sfe uses a 2 wire sensor, so what do I have?

edit:
I did a bit of searching on mr2oc, and it seems that the OEM replacement IS indeed a 4-wire sensor, but there have been a few other members that have 93 jspec 3sgte's that came with 1-wire o2 sensors, so now I'm not sure if I should be looking for...a 1-wire 5sfe sensor or a 1-wire 3sgte sensor. I don't know why toyota would put different sensors between USDM and JDM 3sgte motors though (assuming that the sensors are OEM).

Does anybody have any experience with universal sensors?





This post has been edited by 6gsillyca: May 8, 2008 - 10:23 PM

[lagos]

I bought a basic bosch for a 5sfe.
I think the reason why you got poor mpg is because you tried to use a 4 wire sensor. In a 4 wire sensor, one of the wires acts as a ground, where as in a single wire setup, it gets its ground when you bolt it in. So you probably just hooked up the signal wire, with no ground, and the sensor wasn't able to do its job correctly. Not to mention that 4 wire sensors are designed to be heated at all times.

What kind of mpg do you average ?

[malecrod]

I bought a basic bosch for a 5sfe.
I think the reason why you got poor mpg is because you tried to use a 4 wire sensor. In a 4 wire sensor, one of the wires acts as a ground, where as in a single wire setup, it gets its ground when you bolt it in. So you probably just hooked up the signal wire, with no ground, and the sensor wasn't able to do its job correctly. Not to mention that 4 wire sensors are designed to be heated at all times.

What kind of mpg do you average ?

I actually researched and I think I had it wired right with all 4 wires connected; 2 were ground, one was signal and the last one was 12v ignition source.
But with the bosch, I was averaging 24mpg. Now with the denso, I average 28mpg. I took a recent trip to Chicago and computed 32mpg at one point. But I was stuck in low boost mode of 7psi max because of a TVSV issue I had.