Originally Posted by jarama
What is that wire which many has cut off, some kind of abs-wire? Is it possible the problem locates in some abs-sensor or pump? Where this wire comes and what is its task?
The speedo takes its signal from the ABS, from the speedo the signal is repeated to the climate control and to the ECU. I am guessing the signal to the ECU is telling it the car is still moving so keep the idle slightly higher than when stationery, this seems to be the problem it cant keep it high.
If you read the thread from the start you will know as much as we do, i have not met anybody on here who can explain it but it works with no side effects that i have found.
Several people on here have managed to fix the problem by replacing different parts and thats great for them, this seems to be a fix for those who have tried all those things and got nowhere, so the debate goes on cut it or not cut it, the wire and the choice is yours.
Have fun
