Im sorry for clogging up space with this question but i would be so greatful if someone could help me out here, my car sounds like its blowing off twice? everytime i start to come on boost it winds up quite loud as if i have a vaccum leak or something i've checked my bov but no probs there, also when i come under boost and let off i can hear the whistle from the bov but also at the same time it seems something else is goin pshhh too its quite noticeble bcause the ssqv whistles and its always whistled but recently this other pshh has suddenly rared its ugly head!, i've tried searching other threads but so so many other stuff came up too, any help would be awesome. Cheers.

 

maybe it your CRV...

 

its the CRV if it happens in the transition of the turbos ... which it sounds like thats what hes explaining.