My temp guage goes amost to hot then back to the middle. The thermostat have been changed and replaced the radiator. The fan kick on then it goes back down.

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I’m sorry to hear you're having trouble with your vehicle. If your Wrangler's temperature gauge fluctuates close to hot and stabilizes, the issue could be related to air trapped in the cooling system. Even after changing the radiator and thermostat, trapped air can create temperature swings as the system attempts to stabilize. Depending on how hot it is actually getting, this may also be a characteristic of your vehicle's operation. As for the misfire in Cylinder 2, you might want to check the coil or fuel injector for that cylinder if you've replaced the spark plugs and wires. Also, ensure all electrical connections and vacuum lines are secure. In your situation, I would diagnose the misfire first and then see if the vehicle is still getting too hot after you've fixed it. 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!