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Old 03-14-2014, 09:06 PM   #1
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Join Date: Apr 2013
Location: San Diego
Region: California
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S197 Weird backfire

So u have this weird backfire that is at Low rpm right before it hit vvt. If think it might be my spark plugs but idk. Btw it's a 2007 rough stage 3 stock boost
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