About a month ago my truck would not start on cold mornings. The engine would turn over fine but seemed to not be firing. After replacing the Temperature Coolant Sensor truck started with no problems for the last month. This morning was a very cold morning and my truck would not start again. Engine turns over but does not try to start. No sputtering, nothing. Codes have been checked and nothing is being reported. I can hear the fuel pump run when key is first turned on. Any help or suggestions would be greatly appreciated.