I am trying to pick this stuff up so please be gentle!
Bought the car with the Tuner Pro software so I am thrown right into this stuff.

Going over my data logging results. Wanted to see where the car stands right now.

The mv O2 flashes red at 800 or above, with the car sitting, idling.

When I am driving the mv can go below 100, flashing red and it still can go over 900.

It seems when I am driving faster--highway speeds I get high mv readings. At lower speeds, say around 30mph I get low mv readings.

This is not 100% set in stone but seems to be the case most of the time.

BLM is usually 132-135 (but can be in the low 120's--then soot back up to 130+) It was at 114 once and it was RED. I just saw it at 152 (the car was idling)--the highest yet and it was RED too.

So is the 02 sensor bad maybe? Have I lost some power and MPG? Red means bad right?

Should I be looking at anything else? AFR ect?

thanks!

Hope you can pick up something from this

 

Your O2 mV reading should go up and down (100mV-850mV) rapidly when driving in closed loop and not accelerating or deaccelerating.

BLM 120-140 isnt too bad for a MAF car.

/N.

 

I would make it run closer to BLM 128..
152 feels little to high..

 

see https://www.thirdgen.org/forums/diy-...r-pro-r-t.html

if you haven't--4th post down I attached a txt file