Why does my car not want to start sometimes?

Hello, You likely have an issue with your idle air control valve (IACV). The idle air control valve acts worse in cold weather, and even a slight clog can turn into your current situation. Idle air control valves must let exactly enough air into the engine to sustain constant engine idle when the accelerator is pressed. If you press the accelerator pedal slightly, and the engine smooths out or starts normally, clean the throttle body, and IACV port (inside the throttle body)