Oxygen sensor or O2 sensor.....

I always thought that the turbo timer was not connected to the O2 sensor as the reading doesn't appear but after the dyno session; it all became clear to me.....

What the previous owner said about it not being connected isn't true at all; I can only blame it on my ignorance.....

So all these while it's running on a faulty reading as I found out during the dyno that each time it's on close loop, it's running pretty lean; bordering on 18.0 on the AFR.....

Now that may have explain the consumption was pretty ok and why a sudden step on the throttle always results in some oil at the cam cover.....

The knock must have been dreadful.....

But more dreadful to me now is that my consumption might be even worse than before.....

So here you go, a new RB25DET O2 sensor.....