986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

gsmiller · 06-27-2011, 12:08 PM

I bought my first Porsche two weeks ago -- an '02 Boxster S with ~96k miles -- and I notice a hissing/pssst noise from the top of the engine area when I accelerate. It's most noticeable if I blip the throttle from idle and it almost impossible to hear unless I'm driving around with the carpeting removed from the top of the engine cover.

I suspect I have an air leak somewhere... especially since I just got the P1128 & P1130 codes. But... I also had my AOS fail on me right after buying the car and replaced it already. Not sure if the codes were triggered during that time and just showed up at the end of a drive cycle (just a guess?), or if I really have a separate problem.

Anyway, I heard the exact same noise in a youtube video over here:

http://www.youtube.com/watch?v=YdOyM9z_W54

If you listen around 20 and 30 seconds in, you'll hear the noise I'm talking about. Can someone let me know if that noise is normal or if I have a leak somewhere I need to start investigating? I don't have another Porsche to compare the noise to so I'm hoping to find some help here.

Thanks!

06-27-2011, 12:08 PM	#1
gsmiller Registered User Join Date: Jun 2011 Location: Seattle Posts: 2	Hissing/pssst noise when accelerating I bought my first Porsche two weeks ago -- an '02 Boxster S with ~96k miles -- and I notice a hissing/pssst noise from the top of the engine area when I accelerate. It's most noticeable if I blip the throttle from idle and it almost impossible to hear unless I'm driving around with the carpeting removed from the top of the engine cover. I suspect I have an air leak somewhere... especially since I just got the P1128 & P1130 codes. But... I also had my AOS fail on me right after buying the car and replaced it already. Not sure if the codes were triggered during that time and just showed up at the end of a drive cycle (just a guess?), or if I really have a separate problem. Anyway, I heard the exact same noise in a youtube video over here: http://www.youtube.com/watch?v=YdOyM9z_W54 If you listen around 20 and 30 seconds in, you'll hear the noise I'm talking about. Can someone let me know if that noise is normal or if I have a leak somewhere I need to start investigating? I don't have another Porsche to compare the noise to so I'm hoping to find some help here. Thanks!