Problem solved, it was a leak but none of the hoses. It was the CCV and the Y-hose/pipe didnt connect correctly. Try to test it with a home made smoke system but failed miserably, until my old man told me to spray some throttle cleaner all over suspected area and hear if the rpm jumps up. Works perfectly and got the hoses connected properly. My advise for future DIYers is to mark the CCV and Y-hose/pipe with a marker connected before the installation so that you can easy check if it's connected properly once installed.

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2002 X5 3.0i Sport