Exhaust leak? - TriStateTuners.com :: Home of Tristate Auto Enthusiast

criz · 06-20-2006, 09:14 AM

SOOO yesterday I noticed an additional wooshing sound that I haven't heard before... so I decide to go WOT and then notice my AFR is @ 10.1 and boost is below a bar. When I roll the windows up it sounds like the leak/wooshing sound comes from the driver side by the firewall.

A quick inspection under the hood didn't show anything so today i'm hoping to get it jacked up and looked underneath.

Anyone have a similar problem? If so i'd love to get your insight... thanks

JoeScooby · 06-20-2006, 09:57 AM

Hmm, I beleive if your wastegate is stuck open you would see around 7 PSI. I had the problem of 0 boost.. it fixed itself somehow.

OppositeLock · 06-20-2006, 10:00 AM

For an exhaust leak, depending on how bad it actually is, you will usually make target boost (later in the rpm range) and AFR should still be close to target. It sounds more like you have a boost leak, which generally gives the results you describe. Also, an exhaust leak usually screams, while a boost leak usually whooshes. Check all of the IC connections to make sure they are tight before you go to the trouble of getting it up in the air to look at the exhaust.

criz · 06-20-2006, 10:16 AM

good looking out guys... thanks

criz · 06-20-2006, 11:14 AM

by the way, how do you fix the wastegate issue if indeed it is stuck open?

JoeScooby · 06-20-2006, 11:27 AM

I wish I had an answer for you on that one. My shizz starting working by itself. Maybe get a rubber mallet and give it a few love taps while someone is giving it the gas. Other then that I really have no idea.

criz · 06-20-2006, 10:21 PM

the clamp around the air output from the IC to the motor was loose... tightened it up and WHAM

11.3aft @ WOT

igo4bmx · 06-20-2006, 11:05 PM

Quote:

Originally Posted by criz

the clamp around the air output from the IC to the motor was loose... tightened it up and WHAM

11.3aft @ WOT

thats what i thought- the car was running rich because it was expecting more air, but the leak didn't let it go into the motor

06-20-2006, 09:14 AM	#1
criz Tri-State Post Whore Join Date: Dec 2004 Location: levittown, pa Member #5 My Ride: 2008 Subaru WRX STi iTrader: (0)	Exhaust leak? SOOO yesterday I noticed an additional wooshing sound that I haven't heard before... so I decide to go WOT and then notice my AFR is @ 10.1 and boost is below a bar. When I roll the windows up it sounds like the leak/wooshing sound comes from the driver side by the firewall. A quick inspection under the hood didn't show anything so today i'm hoping to get it jacked up and looked underneath. Anyone have a similar problem? If so i'd love to get your insight... thanks __________________ 2008 WRX STi - The next episode 2004 WRX STi Stage 2 - traded in To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. xbox live: criztoph

06-20-2006, 09:57 AM	#2
JoeScooby Tri-State Addict Join Date: Apr 2005 Location: McGuire AFB, NJ - Cherry Hill Member #345 My Ride: 2004 JPB Subaru WRX Sedan iTrader: (0)	Hmm, I beleive if your wastegate is stuck open you would see around 7 PSI. I had the problem of 0 boost.. it fixed itself somehow. __________________ 2009 Dodge Ram 5.7 ltr beast 2004 Java WRX - SOLD 2005 Silver Forester XT - Wife 2014 Outback 2014 STi Hatch 2013 Yukon SLT

06-20-2006, 10:16 AM	#4
criz Tri-State Post Whore Join Date: Dec 2004 Location: levittown, pa Member #5 My Ride: 2008 Subaru WRX STi iTrader: (0)	good looking out guys... thanks __________________ 2008 WRX STi - The next episode 2004 WRX STi Stage 2 - traded in To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. xbox live: criztoph

06-20-2006, 11:14 AM	#5
criz Tri-State Post Whore Join Date: Dec 2004 Location: levittown, pa Member #5 My Ride: 2008 Subaru WRX STi iTrader: (0)	by the way, how do you fix the wastegate issue if indeed it is stuck open? __________________ 2008 WRX STi - The next episode 2004 WRX STi Stage 2 - traded in To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. xbox live: criztoph

06-20-2006, 11:27 AM	#6
JoeScooby Tri-State Addict Join Date: Apr 2005 Location: McGuire AFB, NJ - Cherry Hill Member #345 My Ride: 2004 JPB Subaru WRX Sedan iTrader: (0)	I wish I had an answer for you on that one. My shizz starting working by itself. Maybe get a rubber mallet and give it a few love taps while someone is giving it the gas. Other then that I really have no idea. __________________ 2009 Dodge Ram 5.7 ltr beast 2004 Java WRX - SOLD 2005 Silver Forester XT - Wife 2014 Outback 2014 STi Hatch 2013 Yukon SLT

06-20-2006, 10:00 AM	#3
OppositeLock Tri-State Training Wheels Join Date: Jan 2006 Location: NNJ Member #1357 iTrader: (0)	For an exhaust leak, depending on how bad it actually is, you will usually make target boost (later in the rpm range) and AFR should still be close to target. It sounds more like you have a boost leak, which generally gives the results you describe. Also, an exhaust leak usually screams, while a boost leak usually whooshes. Check all of the IC connections to make sure they are tight before you go to the trouble of getting it up in the air to look at the exhaust.

06-20-2006, 10:21 PM	#7
criz Tri-State Post Whore Join Date: Dec 2004 Location: levittown, pa Member #5 My Ride: 2008 Subaru WRX STi iTrader: (0)	the clamp around the air output from the IC to the motor was loose... tightened it up and WHAM 11.3aft @ WOT __________________ 2008 WRX STi - The next episode 2004 WRX STi Stage 2 - traded in To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. xbox live: criztoph

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