Hi to all,

I have a polo 1.4 16v 55kw engine bky, I took this from very little from the father-in-law, who had abandoned.
I have a problem that I think is connected to the lambda probe, the car at the minimum, it sometimes seems, "flooded" and at low rpm to me ? happened to see the needle of the rpm go up and down like crazy, and then they see the car turn off and reboot into recovery with the engine not more than 3000 rpm with a light check on. Are waiting of the instrument, similar to a VAS from china that I purchased before finding this forum, so I have a diagnosis but I think that the problem is connected to the probe mount that I see in front of me at the bottom by opening the engine compartment.
I wanted a hand to the search for a replacement why? I see that the probe ? 5-wire, and in spite of the research spasmodic can't seem to get to the****I find only probes with 4-pin, I would like to save if possible and make the intervention from me. There should be a second probe? If s? can you tell me where ? placed in?
I accept opinions, views and anything else, thank you in advance and I hope scusiate the terminology is still inappropriate, but I am really a novice.