Servous Gemeinde, I wanted to clear the suction area with my V70 Bi-Fuel EZ. 2000 times. I also got it! New filter and the dirt from the throttle valve sprayed away with son throttle valve cleaner from ATU. Since I did that, when switching to gas (serial installation of Volvo) does the speed increase. What I also very positive one step. The negative and why I ask for advice is that I have to switch the motor organs after longer. Before that he always jumped on top of it! Grrmpf I suspect that he has no fuel in the line or can this also lie on the throttle valve? Maybe this is just a vacuum hose….? Hmmh Thanks in the Vorraus L.G. Rudi