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Easiest wayto track down a vacuum leak?

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Old Feb 28, 2007 | 04:30 AM
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Default Easiest wayto track down a vacuum leak?

What is the easiest way to track down a vacuum leak on my car?

Finally got some time and some down time with my car and I think I have a vacuum leak somewhere on the car but not sure how to locate it or find out if I have one at all.

Thanks
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Old Feb 28, 2007 | 06:06 AM
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Listen for the hissing sounds or spray carb cleaner from place to place and when the rpms flutter thats the leak spot.
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Old Mar 1, 2007 | 09:16 PM
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With the motor off, grab a buddy that is a smoker. crack the throttle and stick a hose inside the TB, and tape it off. Have smoker buddy blow smoke into the engine. Watch for it. Of course do this in a non-windy and well lit area
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Old Mar 1, 2007 | 09:51 PM
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yup yup slow67 is right, it's faster and easier to look for a cloud of smoke than trying to hear for a hiss. they also make a smoke machine just for this kind of problem.... but watching a buddy trying to blow for very long is funnier/y lol
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Old Mar 1, 2007 | 09:52 PM
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drench the engien bay down in dawn and watch for bubbles
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Old Mar 1, 2007 | 10:11 PM
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A small propane cylinder, open and unlit with the car running. The water or carb cleaner also works well.
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Old Mar 1, 2007 | 10:19 PM
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i have a smoke mechine at work...it works great.
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Old Mar 1, 2007 | 11:36 PM
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carb cleaner...
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Old Mar 2, 2007 | 12:15 AM
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Originally Posted by slow67
With the motor off, grab a buddy that is a smoker. crack the throttle and stick a hose inside the TB, and tape it off. Have smoker buddy blow smoke into the engine. Watch for it. Of course do this in a non-windy and well lit area
How about that. Ha.

Just don be smokin none of that wacky weed.

http://www.youtube.com/watch?v=8R_jcXEelqw
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Old Mar 2, 2007 | 08:17 AM
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propane
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Old Mar 2, 2007 | 08:39 AM
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Originally Posted by Tainted
drench the engien bay down in dawn and watch for bubbles
How's that going to work? The bubbles would be on the inside.
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Old Mar 2, 2007 | 09:50 AM
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Find a shop with a smoke machine and have them smoke test your engine. My fathers shop has one and it works great.
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Old Mar 2, 2007 | 02:27 PM
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Originally Posted by reject
yup yup slow67 is right, it's faster and easier to look for a cloud of smoke than trying to hear for a hiss. they also make a smoke machine just for this kind of problem.... but watching a buddy trying to blow for very long is funnier/y lol
After reading his post I really thought he was joking until you said that. Thats a pretty slick way of checking.
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Old Mar 2, 2007 | 04:17 PM
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I think the quick and cheap way is the use a can of spray carb cleaner.. spray a little (enough to soak the area) around each of the vacumn area that you suspect to be a leak.. if the RPM change.. you found your leak. PCV, Power Break line, intake manifold, TB Gasket ... etc..

This is an old trick that is used for Carb cars but work for EFI too.. been used as long as I can remember.
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