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I just changed out my autolite platinums' because my car was running horrible, and i tried the copper plus champions and now my car is running 100% right. My question is, is there much of a chance that the platinums could of caused any damage? Or just that they ran poorly due to not being copper? thanks, im leaving in about an hour to drive to NC to get tuned so just wanted to know before i headed out, thanks.
 
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