So recently I have been getting this weird squeaky sound when I hit boost. Not sure what kind of leak it is. Also, the boost gauge used to hit 6.7 now it only goes up to 3.5 (×100 mmHg) so im not sure if its a leak in the piping or what. I have a clip of what It sounds like.
If anyone can help it'll be much appreciated.
20210121_122758.mp4