My PMS controller's read out of the O2 is always moving..jumping between 88 and 0 as the engine idles.
Is this normal? It seems to fluctuate depending on combustion cycle.. normal?

I re-attached my upper intake manifold and knocked the O2 line out, when I plugged it back in..the read out seemed to be stable at idle..but only for a few drives. It then went back to the way it was before.

So does your handheld readout read the same way?

Raj

 

you can lean out your idle a little and should stop. I got my idle at -12 and it stays at 0 while it's idling. BUt every car is different.

Amel

 

Amel, what about light-med throttle? Does yours give you a set reading or does it bounce? Mine only give me a solid number at WOT.

Raj

 

Alright.

For tuning purposes I guess a solid # at WOT is sufficient.

Now, what is a safe '.xx' and how do these voltage readings equate to A/F ratios?

Going to track soon so I need a table here!!!

Thanks,
Raj

 

So what I found was that these O2 readings are at the most a general template, the variables being gas, and sensor brand among others.
What I didn't find anywhere on the site was a comparison for our stock/bosch replacement single wire O2 sensor, which is what I am using.

10 PSI on an ~83 degree night gave me a WOT O2 voltage of .88
15 PSI ==== I will keep you guys posted


Raj