Vehicle Renault Megane Grandtour, BJ 2013, 1.5dci 110ps, 151,000km. It starts again, despite the replacement of the injectors it starts again this year. The video is only an example because I usually don’t have my mobile phone at hand and the phenomenon is not quite as strong at the moment. https://youtu.be/5M-ajmq8eXE No error in the error memory. The problem is only a short time, after about 2-5 minutes it runs perfectly. In the network it is called normal behavior for a 1.5dci. I am not satisfied. The following would fit well (excerpt from the forum) : With very low fuel injection quantities smaller about 4 mg (in thrust) it is necessary that the rail pressure regulator controls some fuel from the high-pressure system. The reason is that the high-pressure pump is not zero transportable. This means that the high-pressure pump also promotes fuel into the high-pressure system when the volume control valve is closed. This would result in too high rail pressure and therefore too high The control types are active in the following operating points: At engine start: The pressure control is always active. If the engine is running: If the coolant temperature is below 1 °C, the pressure control is always active. If the coolant temperature exceeds 15 °C, the combined control is always active. So in my case, a defect pressure control valve on the rail could be responsible? On suspicion, I would not like to exchange, since it costs approx. 100-1300€.