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Why does my car misfire when it’s cold?
The weather is starting to get colder where I live and I’ve noticed on really cold mornings my car will misfire. Why does it only misfire when it’s cold?
Bonnie Stinson · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
It’s always a little worrisome when your car doesn’t start or run as it should. In this case, cold temperatures can cause a misfire because of your air-to-fuel mixture.
At normal temperatures, fuel has a pretty wide range of temperatures it can combust at. Colder air temperatures narrow that range, making it harder for combustion to happen.
If your vehicle is misfiring or has a rough idle when the temperatures drop, here are some tips to help fix the problem:
- Let your engine warm up before driving
- Check the oxygen sensors to make sure they’re functioning properly
- Replace any damaged or corroded spark plugs
- Make sure the fuel injector isn’t damaged or clogged
Having a mechanic check your engine to make sure the misfires aren’t a sign of an underlying issue can give you some peace of mind, and so can ensuring you have the right
car insurance
coverage. Finding coverage that will protect your vehicle is easier than ever with the Jerry
app.Just answer a few quick questions in the app and then sit back while Jerry delivers personalized quotes so you can shop coverage quickly and find the best policy to fit your needs and budget. And best of all, Jerry customers can end up saving a ton of money—$887 a year, on average!
View full answer
- Gregory R.
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