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Old 07-27-2012, 02:20 AM   #4
20camaro12
 
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Drives: 2012 45th anniv. Convertible SS LS3
Join Date: Oct 2011
Location: Riverside, CA
Posts: 321
The last time I had an idle surge such as this I found a vaccum leak in the intake. I have another one that is killing my MPG, but haven't found the source yet.
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