Hello, I’m starting a new thread to find out why my D5’s tone and running culture and idleness are constantly changing. To the car: V70 D5 (185PS) switch, 210000 km, BJ 2009. The problem: injectors have been cleaned and tested at Bosch. Everything in the target range, errors in the system are also not deposited. Swivel flap is not suspended. If the lever is off, very smooth and not oily. Engine bearings are also good. Exhaust system has been tested and is It starts very well and has a soft, normal run for the first seconds. But sometimes and more and more often the sound changes into a hollow noise, especially when changing loads. Give gas, take everything away normally. Little gas or gas completely –> hollow noise as if a chamber is opened. It doesn’t always do all this and happens in combination with occasionally bumpy idle, rarely even a slight drop in the speed, which catches itself again. In addition, a light Trembling at constant speed, with little gas. I’m annoyed… where can I still look? AGR? Charging pressure valve?