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02-07-2011, 08:15 AM
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Adjusting idle mixture screws - vacuum source
When adjusting the idle mixture screws, I am supposed to hook a vacuum gague and adjust the screws to get the most vacuum, where do I connect the gague? I heard there are two types of vacuum, ported and manifold?
In the third picture, the port on the bottom rear of the carb, is that a good source?   
Last edited by Snoopy'sVette; 02-07-2011 at 08:32 AM. 
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02-07-2011, 09:45 AM
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Snoopy, yup that one should work fine, any port below your throttle plates on a carb is a source for manifold vacuum.
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