Trembling in cold weather and slight whirring noise when slowing down

2008 KIA OPTIMA
160,000 MILES • 4 CYL • AUTOMATIC
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Has a slight whirring noise when slowing down. Also trembled slightly in cold weather after starting but in a few minutes trembling goes away. just had catalytic converters replaced. Car acceleration is good on highway got up to 70 in about a minute no tremble. Could it be the few mixture?
Dec 10, 2020 at 4:46 PM
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JACOBANDNICKOLAS
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Hi,

It could be related to a few different things. Things like worn ignition components, fuel pressure, a faulty oxygen sensor, or even a bad motor mount can cause a vibration.

Here is what I suggest. Because there are several things that can be the cause, I recommend having the can bus system scanned. CAN stands for controller area network. Basically, several modules/computers are tied together using a few wires. By scanning the CAN system, it should identify any code from any of the different modules.

Here is a video showing how it's done:

https://youtu.be/InIlnsjOVFA

Let me know if that is something you can have done. I especially recommend doing this if the check engine light is staying on when the engine is running.

If you retrieve codes, let me know what they are so I can better direct you.

Take care,
Joe
Dec 10, 2020 at 7:50 PM
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No engine sensor lights come on but will take it to Goodyear to have it done. This noise is not new car has had it for a few years. Have had new struts put on new tires new ignition switch with keys. They always do diagnostic and the car is 12 years old.
Dec 11, 2020 at 8:41 PM
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JACOBANDNICKOLAS
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Hi,

If you have a chance, could you let me know what is found? It will likely help others in the future.

Take care,
Joe
Dec 11, 2020 at 10:29 PM