Hello, I'm having a problem with a pulsating N75 valve. Due to emissions regulations, I had to convert from a DTA S80 to the original ME7.5.
It's an AUM engine in a kit car similar to a Seven. Everything is original, except the N249 valve was removed, and a K&N filter with an aluminum
 TIP was installed. The only thing that isn't connected is the N75 outlet to the atmosphere.
Not to the TIP, but to the atmosphere. Could this be the problem?
Perhaps someone could take a look at the CSV file and give me a tip.

Perhaps I overreacted a bit. According to the diagnostics, I previously had a pressure drop between the turbo and the throttle body (blow-up valve not connected to the TIP, but to the atmosphere). After I repaired it and cleared the fault codes. It was the first log after the repair. The log was over 3 MB, and I cropped it. Now I've looked at the complete log and see that the N75 behavior has improved significantly. What I forgot to mention is the adaptive learning. I read somewhere that this learning process can take up to an hour. I've owned the car for 20 years, and I'm not sure if the turbo I installed is original or a K03/04 hybrid. If it's a hybrid, is remapping necessary?The complete log is attached.