Quote Originally Posted by aussieg60 View Post
That picture makes a bit more sense now.

What you have is the new OEM flange where the bottom is usually blanked off and the top 2 are usually used for the temp senders on a MK2. Someones, stuck the temp sensor down the bottom, hence you got an extra sender on top (white). I suppose you got a spare or bakup. The bottom connector is your temp sender for your gauge by looking at the color of the wires and that seems to work ok as you say.

Did the car run better with it plugged in the white sensor ? Maybe the blue sensor is faulty ?
The white sensor was replaced 3 times and it didnt make a difference when pluging it in to the white one instead of the blue one.

ECU fault?

BTW Thanks for helping me out mate.