Hiss?

y2ks2k · 02-21-2004, 02:13 PM

This may of course be normal but I now have 6K miles and I get a very loud hissing noise when I’m in the 3K to 4K RPM range. Its there even if I just hover at say 4K rpms with no acceleration. I am stock. I’m hoping its just the blow off valve or something. Its pretty loud.

filbert · 02-21-2004, 03:42 PM

some people have found loose intercooler hoses I think... so maybe check all those out.

choonzAWR · 02-22-2004, 07:08 AM

is your air-conditioning on ?

crashsti · 02-22-2004, 08:15 AM

does it happen when you let up on the gas from part throttle? my car does make a hissssss sound when i let up on the gas under the situation you describe, but its done it from day one. i'm pretty sure its just the wastegate blowing off boost. but i really don't know all that much about turbo systems so don't take my word for it.

wrx_sti300 · 02-24-2004, 03:28 PM

Turbo Spoolin' 8)
hahahaha, I think it might just be the stock bypass valve, my wrx does it sometimes to.

02-21-2004, 02:13 PM	#1
y2ks2k Senior STI Driver Posts: 390 IWSTI Addict since: Jun 2003 Trader Rating: (0)	MB Quart tweeter install in rear doors This may of course be normal but I now have 6K miles and I get a very loud hissing noise when I’m in the 3K to 4K RPM range. Its there even if I just hover at say 4K rpms with no acceleration. I am stock. I’m hoping its just the blow off valve or something. Its pretty loud. This ad is not endorsed by this member. Please register or login to hide this ad.

02-22-2004, 07:08 AM	#3
choonzAWR Professional STI Driver Car: Aspen White 04 STi Location: Bristow, VA Posts: 421 IWSTI Addict since: May 2003 Trader Rating: (0)	Xcceleration performance kit?? is your air-conditioning on ?

02-24-2004, 03:28 PM	#5
wrx_sti300 Senior STI Driver Car: 2002 WRX Wagon Fav Mod: Cobb Stage 2 Power Pack Location: Brampton,Ontario,Canada Posts: 368 IWSTI Addict since: Mar 2003 Trader Rating: (0)	Re: Differences between the production and actual rally car Turbo Spoolin' 8) hahahaha, I think it might just be the stock bypass valve, my wrx does it sometimes to. This ad is not endorsed by this member. Please register or login to hide this ad.

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02-21-2004, 03:42 PM	#2
filbert Professional STI Racer Car: RIP 98 Accord. Yay Location: Schaumburg Posts: 655 IWSTI Addict since: Nov 2003 Trader Rating: (0)	some people have found loose intercooler hoses I think... so maybe check all those out.

02-22-2004, 08:15 AM	#4
crashsti Spec C Club Fav Mod: stockboy Location: massachusetts Posts: 1,629 IWSTI Addict since: Sep 2003 Trader Rating: (0)	does it happen when you let up on the gas from part throttle? my car does make a hissssss sound when i let up on the gas under the situation you describe, but its done it from day one. i'm pretty sure its just the wastegate blowing off boost. but i really don't know all that much about turbo systems so don't take my word for it.