Vacuum Leak

[StockMuffinSE]

So lately ive been hearing a vacuum leak from my engine bay ...or what sounds to be a vacuum leak. Anybody else have previous experience with this? Any insite would be appreciated.

[Beancooker]

Did you put on an intake? If you did, it's just what happens. It can either be a sucking sound or a whistle sound.

[Maverick7687]

I have an almost demonic growl from my intake after about 3500rpm.. It sounds like a vacuum leak when I am just barely on the gas at lower revs though.

[StockMuffinSE]

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no....i do not have an aftermarket intake...haha

its a leak somewhere...just dont know where

[Beancooker]

Does it run any differently? (like crap?)

[StockMuffinSE]

sometimes a little un-smooth

but other then that id guess a loss of power

[Beancooker]

I'm guessing you checked all the hose connections?

Do you have an oil catch can? sunlitsand's post made me think of this;

As to your vacuum leak, check 2 things, 1 all the connections for the catch can. 2 start the car (with hood up) and rev it a little. Watch the hose from the PCV valve to the CC and from the CC to the intake. Does the hose collapse? Also, when I put my CC on I immeadiately (sp?) noticed a louder sucking sound. An easy way to check for leaks on the CC tubing is to light a cig and hold the cherry close to the ends of the hoses. If the smoke looks to be getting sucked in, you found your leak!

If you don't have a catch can, disregard the above.
Modified by beancooker at 8:27 PM 10/30/2006

[StockMuffinSE]

Ok...heres a twist to the thread....it SORTA sounds like i have a supercharger on my car haha...u know that high pitch whine they have? that i can hear at lower rpms, but then when i reach higher it sounds more like a sucking noise...