So long story short. Driving the car on the highway full load on fourth or fifth gear and boost lower than expected code is set and a cel. After that found that I have an injector blow by problem exhaust gasses pass through some of the injectors. Everything redone and driving again at full load the same fault and one of the injectors seems to form tar stains on the valve cover. I can hear the engine is a bit strange but no big puffs from the injectors. My question is could the injectors leak the boost when it goes around 20 bar? I will fix the injectors but i want to know if the problems are related. Thank you!