The sound of escaping air.
06-03-2002, 07:43 AM
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Join Date: Apr 2002
Location: Simpsonville, SC
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The sound of escaping air.
I haven't gotten to check into this problem in depth yet, because it just started, but I thought I'd post it in case any body had any quick ideas as to what it is.
In my '86 951, I just started losing my boost as it winds up past 4000RPM and then hearing a very distinct sound of compressed escaping air (the way an airhose would sound when sudden pressure was released.) Blow off valve or something?
Just wondered if anyone has had a similar situation, or knew of what might be a likely culprit.
I am always lurking and learn so much from you guys, what a resource! I love these cars, but I am not very proficient in the ways of the Turbo. <img src="graemlins/c.gif" border="0" alt="[ouch]" />
-Michael
In my '86 951, I just started losing my boost as it winds up past 4000RPM and then hearing a very distinct sound of compressed escaping air (the way an airhose would sound when sudden pressure was released.) Blow off valve or something?
Just wondered if anyone has had a similar situation, or knew of what might be a likely culprit.
I am always lurking and learn so much from you guys, what a resource! I love these cars, but I am not very proficient in the ways of the Turbo. <img src="graemlins/c.gif" border="0" alt="[ouch]" />
-Michael
06-03-2002, 03:26 PM
#2
Racer
Join Date: Apr 2002
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Maybe you have a tear/hole on one of your "pressurized" intake hoses. On my 951 I have only just started making boost at 4000rpm. It's possible that as the intake starts getting pressurized, the tear/hole opens up and "pshhhh" out with the hp!
Then again it could be much simpler - have you checked that all of your hose clamps are tight?
As far as it being your BOV, you have 3 hose clamps to check there too! If they appear tight, pull off the BOV, and see how the membrane looks with a flashlight. They tear all the time. It would be a good excuse to upgrade your BOV - my Forge BOV arrives tomorrow!
Good luck - HTH!
Then again it could be much simpler - have you checked that all of your hose clamps are tight?
As far as it being your BOV, you have 3 hose clamps to check there too! If they appear tight, pull off the BOV, and see how the membrane looks with a flashlight. They tear all the time. It would be a good excuse to upgrade your BOV - my Forge BOV arrives tomorrow!
Good luck - HTH!
06-03-2002, 04:07 PM
#3
Three Wheelin'
What you need to do is open your hood and have a friend listen for leaks as you accelerate up through the gears. A long straight road that isn't too busy and some nylon straps will be handy for this one.
