oskar1981
Guest
Hi, My Leon started to make slight turbo whine (more like an owl noise) when deccelerating, so I sent it to Midland turbo for repair. They said turbo is fine and it only needed cleanup as the vanes were sticking. After refiting turbo was fine for few weeks, but now the noise is back. It only happens when in low rpm between 1000-1500 and when I put my foot of the gas. I also found out that when I detach vacuum hose to the vnt actuator the noise is gone. So it looks like noise is there only when vanes are open. They get opened right after startup when vacuum solenoid sucks vacuum and moves the vnt rod. It is also quieter when engine is cold when it gets hotter the noise is more noticable. I also have very slight hissing under hard acceleration but that's two different noises. Could this be related? No power loss. Any suggestion? Please help.