vaccum leak check

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11-11-2005, 09:53 PM

1badasZ

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Location: Florence Mississippi

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vaccum leak check

what is the best or just one in general for checking for a vaccum leak? ideas please..

11-12-2005, 04:53 AM

SS RRR

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Re: vaccum leak check

Put soapy water in a spray bottle and apply where you might think are problem areas.

11-13-2005, 04:20 PM

1badasZ

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Location: Florence Mississippi

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Re: vaccum leak check

what do i look for then? will it bubble more?

11-13-2005, 08:07 PM

turbo_Z

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Location: Kansas

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Re: vaccum leak check

The messy way of checking for a vacuum leak is by running the motor and spraying carb cleaner around the intake or where you might think there is a leak. Youll know if you found one when the idle picks up for a sec. burning off the carb cleaner.

The other way is to seal off the throttle body and then hook up a vacuum gauge and pump to create a negative pressure inside the intake. Then you watch the gauge to see if the pressure increases after 5 minutes or something.

11-13-2005, 08:13 PM

ChickenScreamer94

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Location: Crossville, TN

Posts: 486

Re: vaccum leak check

the LT1 only has a vacuum ports on the manifold. I would check each of them (EGR, HVAC, a few other i cant remember are on the IM). The TB has the EVAP and whatever. Check each system part by part. You need a vacuum gauge (~30 bucks) and watch guage. if the pressure drops fast then you have a leak.