OKay, thanks for your reaction.

Your answer gives me a slight problem to check if I can hear it click.
1. when I turn the key there is a loud noise for appr6-8 seconds. I don't know where that comes from (has nothing to do with the problem).
2. I do not know where the idle control unit valve is located. I have the description of my car from alldatadiy.com.

can you help?