I see a figure on my laptop saying "lambda correction inv. in %" I am not sure what it means, but going up and down several times a sec (like it corrects) only when giving throttle so it boost from little to max this figure becomes constant.

Havent acutaly noticed this before, only now after fixing my tps that was broken. What can cause it to regulate like this all the time??

The lambda is very new.. so it should work. Everything ells works fine such as cts.