hissing uder hood?
 

A few days ago I noticed when I pound my gas I hear turbo spooling then a consistent HISSING, however sound like is coming from driver side of hood.

I haven't change my DV yet after I got chipped, planning too and also boostgauge.I searched and most said need to get new DV.

I don't have a CEL, maybe alsovaccum leak? any suggestion?

RE: hissing uder hood?
 

Could definitely be the dv...

RE: hissing uder hood?
 

My guess would be the DV but the DV in my 1997 a4 is near the passengers side

RE: hissing uder hood?
 

def. sounds like a vacuum leak. Check all of your lines and hoses. I agree with bendet that the dv is on the passenger side. the dv also doesnt really hiss while at wide open throttle even when bad. If you have a vacuum gauge/pump you could hook it to the top of the dv to see if it held vac but I doubt thats the problem

RE: hissing uder hood?
 

check for a boost leak
theres a diy somewhere on here

RE: hissing uder hood?
 

update: problem fixed a while ago but just wanted to fyi update.

finding boost leak was a bitch! I bought a boost gauge just for some t shooting, after long hours of trying to find where the boost leak was. I found a crack in one of the hoses. pic below, i'm not a techie but, what to you call this? I just got bought same item at audi dealer for a few bucks however, the new hose was braided. boost leak fixed!

RE: hissing uder hood?
 

yep, thats was the same part for me. almsot all of our cars get a leak there. just a weakpoint

RE: hissing uder hood?
 

yep, i had a leak there as well:D

RE: hissing uder hood?
 

http://www.dragsource.com/articles/snake4.jpg

SNAKKEEEE


sorry had to...

RE: hissing uder hood?
 

I call it the most common vacuum leak on these cars. The newer version of that hose is a little beefier.