Slow crank when very cold

Hi and thanks for using 2CarPros.

I'm not sure how cold it is where you are located, but once the temperature reaches freezing, the average battery will lose between 35 and 40% of it's cranking ability and the colder temperatures demand more current to start the car. Most parts stores will load test a battery for free with hopes of selling you a new battery. If you want to check it yourself to see if the voltage level is maintained, take a volt meter and connect it to the battery. You should see 12+ volts with the engine off and all power accessories off. Next, have a helper crank the vehicle while you watch the volt meter. If the reading goes below 9.6 volts while cranking, replace the battery.

Also, a dirty or corroded battery terminal can also magnify the problem. Any added resistance between the battery terminal and battery reduces power. I have actually seen loose or dirty cables lose connection in cold weather causing a no start. Once everything was cleaned and tightened, all was good again.

Here are a couple links you may find helpful. Take a look through them and see if they help.

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/symptoms-of-a-bad-car-battery

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

Let me know if this helps or if you have other questions.

Take care,
Joe

Not a problem. Let me know if I can help.

Take care,
Joe