I need help and I am hoping someone has had this problem. I have a 2011 Wrangler and have a cold start issue. I live in Florida and when it gets chilly my jeep has a hard time starting. Summertime is not really an issue. When I go to start the jeep it will start up but immediately shuts off. I have tried turning the key to the on position and waited till I buckle up then turn the key to crank and it still fires right up but immediately shuts off. It is back at the dealership but they cannot explain what it is. No check engine light, no backfiring, no rough idle. Once the sun warms the jeep it will start right up and runs great. If anyone can help I would very much appreciate it. Thank you