ok as far as i have picked up, i understand that a 3 wire lambda probe is not as good as a 4 wire one, for what reason i am yet to find out.
i was doin the head gasket on my 1.2 punto the other day and noticed it has a 4 wire probe in it!!!
why is this? i mean its not exactly a performance engine now, so why do they have the 4 wire probes, instead of just a 1, 2, or 3 wire one?
why are the 4 wire ones better