This has happened so many times it's so annoying. Ha it'll make a weird sound that's hard to explain. Kind of a whoosh whoosh whoosh sound every time I go to shift and it'll only give me 5 psi instead of 22-24 bcuz I have this tune that the previous owner says gives my car 290 hp and 340 torque. I've had the MAP sensor and an injector seal replaced and it's doing it again. I autocross competitively so I need my car 100% but it keeps doing this and is very depressing. Lol please help!!!

 

That's turbo flutter and you have a boost leak check charge piping, intake piping make sure that they're secured properly.

 

Last time I had this I removed the bolt holding my K&N to my engine and it fell out of the silicone coupler.

 

That's the best way to describe it. A flutter sound. Sometimes it happens, sometimes it doesn't. It's really weird.