Thanks Nick, so in that way you are explaning that if these 2 sensors are wrong gapped or not in time can effect the fuelling and therefor the engine can get too rich or too lean. Am I correct?

And for that software, that will be RP Lab I assume.

Well I am into electronics but I have to admit that seeing those screenshots of this program it's not so easy to understand for someone who is not a engine tuner. Of course afer hard study I will hopefully know what it all means, but I think it's a big risk for someone if he intisapates (?)the values wrong and takes the wrong action..

So therefor I collect as many as possible info what can cause my engine to go lean. Hope you will understand.