Hello everybody, I drove 20 km yesterday everything in order After a short break where the engine was off it started, that I always get such a sewing machine hacker when accelerating, but only in case of load, who I take the foot off the gas and keep the speed is everything quiet but as I give gas again it starts again. At standstill the noise is not to be heard as said only under stress. Can someone tell me what that can be. I thank you for the help