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Discussion Starter #1
i had really bad misfiring before but i figured that was because the plugs i was using were at least 60k old. so i put in a set of denso platinums and the car ran great, no misfiring at all. now im starting to feel/hear the same misfiring, but it has only been 5 or 6k miles since i put in the new plugs. what could be causing this?
 
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