Could someone tell me if there's anything unusual about my car? My boost pressure keeps decreasing at higher RPMs, and my fuel consumption has increased by almost 2 liters.
All hardware components have been checked. The LMM (likely referring to a lambda sensor or similar) is only 5000 km old. The hoses are in good condition. There are no leaks whatsoever.
Is it normal for my boost pressure to decrease and my duty cycle to increase as the engine speed increases?