What is the reason for the high idle speed of Touran 2.0 in the morning?

For your question, if the idle speed of the cold car is high, ecu will monitor the water temperature information of the engine after the vehicle starts at low temperature, and use this as the main signal to determine the fuel injection quantity of the engine. If ecu detects that the engine water temperature is too low, it will start the cold car fast idle program set by ecu in advance, which should be normal. If the water temperature is normal or the idle speed is high, it may be that the idle motor or throttle valve is faulty, or the air intake system is leaking. I hope my answer is helpful to you.