Okay so last year I bought a set of the NGK Iridiums and installed them. I did gap them to spec of the CL. I see on here a lot of people say do not gap them because they come pregapped. When I checked the gap, they were not to spec of the CL. I have been a random misfiring problem a lot lately followed with horrible gas mileage. Im thinking the gap might be the problem. What is the reason everyone says not to gap them? How do they come "pregapped" when they are not gapped to spec of the vehicle. Help Pleaseeeee!
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