I bought this car almost 4 years ago. Every winter I have the same problem. I start it and it starts hard and sputters for a few seconds and then goes back to normal. Took it in last year while I was on warranty and it wasn’t cold enough and they couldn’t find anything wrong. Yesterday was the first cold day of the winter. Around 0 degrees f. For the first time it wouldn’t start. Finally after about ten times or so of trying it started. Any ideas?