Hello, I have a passat 3b 1,8 turbo with chip and 57i kit from k&n. My problem: At 5000 upm I suddenly have no more power of the turbo blows. Almost like when gear changes. So, now I blow the gas again and I have power again. I have recently installed an open K&n and now I hear the intake noises. I noticed that with easy acceleration a very loud suction or blas noise has. Is the blow valve broken? I have already the pressure box changed after advised by my workshop Fuzzi (costed 11 euros) It did not change anything. Air flow meter is ok. (have changed) No change However, he shows a fault code on the error diagnostic device which says that the LMM is worth too high. What can that be?? Did anyone ever have this from you??? Thanks already in advance Freddy