Hello, I have a problem with my 2001er(?) Doblo. I started it today, ran perfectly for a few seconds, I was able to drive up the speed normally. Then the speed went back to approx. 1000 u/min, stayed there for a few seconds, no matter what I operated the accelerator. Then the speed went to the half and then the engine went off. I could not start the engine any more. Everything organs helped nothing except that it stank to Diesel. If I want to wait a bit and start the engine the engine gives a short jerker of itself as if it would come and then that was it again. I had that once a few months ago. But then it went on again. Do you know what it might be? Greetings