Quote:
Originally Posted by Tucson Mike
Did you buy the plugs from a reputable seller? I recently ran into a similar issue where I bought plugs (denso) off ebay for my sequoia and they were counterfeit. Immediately #8 started misfiring and I replaced just that plug. All was well for about 15k until I got multiple misfire code and did more researching and discovered mine were counterfeit. If your vehicle was running fine before you put the new plugs in and the wiring is routed correctly, I would look at the plugs being defective. Good luck Mike M
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Yep, my money is on the counterfeit plugs. Take a picture of them for some lol
