I have had this problem for a while now where my car (stock turbo) will boost up to 25psi which is likely more than what my engine can take, and start surging/fluttering (during acceleration). Mind you not to get this confused with your traditional turbo flutter when you let off the gas. The car is taking in more air than it needs, thus spewing the excess out, causing surge. As a side note, I also notice it happen even more when its warm outside. It can't the the bov or bpv because those only activate when letting off the gas. The only thing I can think of is the wastegate being stuck closed. Has anyone ever has this problem? Any ideas/ Solutions?