Resolved Need Help Identifying this Part on My Galant

[Pasta_Ricer]

Hi everyone!

I was wondering what this part is. It seems to have an adjustable screw in the center. The adjustment positions are labeled "P" and "I" and mine was maxed out at the P.
It's attached above the firewall.

Pictures attached below.

Thanks!

EDIT - RESOLVED - SEE: No O2 Sensor Voltage and Unable to Find it!

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[Pasta_Ricer]

Hey!

I just figured out what's going on and spoiler alert, I don't have an O2 sensor!

Yes, my cat has been deleted.
Yes, the sensor could have been thrown away or something.
BUT, I still have a wire attached on the ECU for the sensor and the first clue would be that it's almost gray instead of white which should be for the O2 sensor.

I got really annoyed today when I couldn't find the sensor and tried to follow that gray wire. Did lots of multimeter continuity checks and I found where it goes!

Apparently, my car doesn't have an O2 sensor from factory and instead has a potentiometer to change the AFR by simulating an O2 sensor voltage. And yup, it's the same weird part that I posted in my other thread, looking for some info on the adjustment with "P" and "I" labels. As it turns out, I had a dummy moment and misread them as they are supposed to be R and L, standing for rich and lean. Then, everything just clicked.

By turning that, you can richen or lean out the mixture with ease. Pretty neat!

I wonder if I can remove that, put a hole in my exhaust, and just use a cheap O2 sensor to get consistent results and stuff. A heated sensor would be much better.

So yeah, the adjustment was set on full rich mode (emulating a lean 0V O2 sensor signal which would tell the ECU to make it rich) and I turned it up to be a bit leaner and yep, I don't get that super nasty exhaust smell that the whole family complained about every time I fired up my car .