No start in cold weather

The only thing that really cares about the temp are the fluids. Usually the engine doesn't look at temp other than to adjust fuel to adapt to the conditions. So that means we either have a fuel pump issue not supplying enough fuel in the cold. Or we have a sensor issue that is telling the PCM that the temp is different than it really is and so the injectors are not delivering the proper amount of fuel.

The easiest way to test if this is fuel related is to spray a little starter fluid in the intake when this is acting up and see if it fires. If it does then we can dig further into the fuel system.