I am experiencing a low pitch hollow whistle that seems directly related to boost. It starts at 2 psi and fades out by 3.5-4 psi. It will make the sound rising through 2 psi as well as decreasing down through it. At first I thought a boost leak. I have checked for a leak and can’t find any. Also, would a boost leak fade out as pressure increases? The sound seems to be on the driver side but sound travels so it may not actually be on the driver side.
Has anyone else experienced anything like this?
Has anyone else experienced anything like this?