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Old 12-13-2012, 10:55 AM   #13
Zell
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Join Date: Jun 2009
Location: Such City
Posts: 5,641
My Ride: '02 Dogemobile Shibe
I think it's the ECU fan. If you put the key in acc, you'll hear a distinct "whirr" noise of a fan coming right from the box.
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