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It is controlled by the computer and is not adjustable. If it is so slow that the engine wom't idle the idle control solonoid needs cleaning. It is attached tothe throtle body and clean it and where it mounts with carb cleaner. Also clean the inside of the throtle body where the throtle plate is as a carbon ring forms there.

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โˆ™ 2015-07-15 18:36:45
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Q: How do you adjust the idle speed on a '91 Chevy Cavalier?
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