Ok, I am going to replace my radiator and heater core this weekend. I am getting a couple of miss fires too. My coolant level occasionally gets low due the slow leaks. If the coolant gets low could it cause a miss fire. Due the the coolant not reaching the temp sensor? Any advice would be appreciated. I just replaced my plugs a month ago and coil packs last year. I also replaced the temp sensor last year. Thanks again for the help!!!