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Vacuum leak

This is a discussion on Vacuum leak within the General Help forums, part of the LSx Technical Help Section category; Just wondering what you guys think is the best way to check for a vacuum leak?...

  1. #1
    Junior Member
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    2000 Pontiac Firehawk

    Vacuum leak

    Just wondering what you guys think is the best way to check for a vacuum leak?

  2. #2
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    I have been told to spray some soapy water on the intake manifold and hoses to see if the suds bubble at the source of the leak. I have also been told that brakleen is also helpful as it will cause the idle to surge at the source of the leak.

  3. #3
    Senior Member JayTA98's Avatar
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    1998 Trans Am

    Quote Originally Posted by cammed goat View Post
    I have been told to spray some soapy water on the intake manifold and hoses to see if the suds bubble at the source of the leak. I have also been told that brakleen is also helpful as it will cause the idle to surge at the source of the leak.
    This. Carb cleaner is good to spray around. You will notice the idle changes when it gets sucked in by the leak. Check the PCV tubing that goes around the back of the engine. The tubing tends to melt and the rubber to rot which creates a leak.

  4. #4
    That guy thearborbarber's Avatar
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  5. #5
    Junior Member Randyboyy's Avatar
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    1999 mustang

    To find the leak spraying soapy water is the best way.

  6. #6
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
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    Any updates OP?

  7. #7
    Veteran 0rion's Avatar
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    06 duramax

    check the back of your pcv line where it bends to go into the intake.....most common place to develope a vacuum leak on these cars.

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