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Old 11-14-2014, 11:20 PM   #3
Corts60
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Join Date: Jun 2008
Location: Holland, MI
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Re: Adjusting Idle Mixture Screws Does Nothin - Quadrajet

If they are not responding, you more than likely have a vacuum leak. Check that all gaskets are sealing properly by running the engine and spraying carb cleaner around the base. If the engine speeds up, you have a vacuum leak.
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