Well for the past 2 weeks my car has been feeling sort of hesitant when i get on boost, not necessarily lag but something else. I really think it could be my blow off valve, i have a Greddy Type RS, vent to atmosphere. Any idea it leaks on a high load and I can hear it creeping and it also flutters i just want more opinions before i go ahead with a whole new set up.

 

What turbo are you running? Are you tuned for vent to at?

 

stock turbo and I'm tuned at 25psi VTA