Well I was almost completely fed up trying to locate the problem. Until I think I found it on accident. I was washing my engine to get ready and pull the valve covers to check the cam and springs when I head a strange noise when water hit the motor while running: Air pulling the water into the intake.

Now I tried the carb cleaner while watching STFT's and found nothing but when I covered the intake with water I found a leak on the EGR tube. I have a new o-ring comming tomorrow.

Just a sugesting to anyone having the same issue. It was very obvious where the leak was with water.