Cylinder 4 misfire

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. So sorry to hear you're having trouble with your G35. If you've replaced the coil and spark plug and swapped them around but still have a misfire in cylinder 4, another issue could be causing the problem. It might be a fuel injector issue or even low compression in that cylinder. Electrical wiring connected to the coil or injector can also be a culprit. Since you've been dealing with this for over two months, it might be time for a more in-depth diagnostic to pinpoint the exact cause. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!