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Upper intake was OEM but the PCV was not. And the air intake was aftermarket as well.

2016 and NGK

Hello, I was driving late one night and my Jeep started driving rough I pulled over and pulled up code p0300. Towed it to my house and replaced the spark plugs. Ohmed out the coil packs and they also seemed fine. Jeep sounded worse after replacing the plugs. Towed it to the dealership that took...