Fist let me say that i Just got my 2008 wrx 3 weeks ago and have had to change the down pipe gastket allready.
once i did that i could here what sounded like waistgate flutter and now its more of a ticking sound with a faint whisleing sound this happens from -5 to 5 psi in boost. then after 5 it seem to stop but the car is loud with perrin down pipe and spt exhuast hopping its just an exhuast leak. hopping someone can help me out. and i have tride to reshearch this befor i posted. thanks
OK ya Bad spelling my bad trying to type while at work. UM so i made a video and u cant here the sound at all. so then i took my buddys 2005 sti stage 2 out and his made the same kind of sound just not as bad. still not sure what it is but both of are car boost fine and we couldnt fine any kind of leak. the only thing with mine is i have a down pipe with spt exhaust and junk injens intake and have had a po244 code come up twice. and as far as i no i dont have a tunem, but this week i have a AP coming with Perrin Intake.
ok so iv been looking all over and think i have found what the problem is. found on Nasioc
"very faint ticking/Knocking sound low rpm under load.
Said to be BCS ticking or clicking. so if this is what it is how do i check for this and how can i fix it?