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2011 Civic engine vibration rpm fluctuating

 
Old 03-23-2019, 12:15 PM
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Default 2011 Civic engine vibration rpm fluctuating

2011 Civic LX with 64000 miles. When i start the car and engine is cold i can see the rpm fluctuate up and down about 30-40 rpm. Smooths out a little when the engine is warm, however, when i stop at a light, i can feel the steering wheel vibrate and you can feel the engine is not running smooth. I changed the spark plugs and air filter. I was going to use Seafoam, but i read its not good for newer cars. I don't know about it. Also read some stuff about bleeding the coolant maybe? Any tips?
No check engine light.

Thank you.

Last edited by Marcin Rollak; 03-23-2019 at 01:44 PM.
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Old 03-25-2019, 09:47 AM
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Default Re: 2011 Civic engine vibration rpm fluctuating

An internal combustion engine vibrates because of explosive action. More explosions per revolution, less vibration.
Electric cars vibrate much less when stopped.
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Old 04-01-2019, 02:17 PM
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Default Re: 2011 Civic engine vibration rpm fluctuating

I forgot to add, that i got a message on the dashboard to check the gas cap. Also, you can tell the car is little bit weaker.
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Old 04-02-2019, 12:30 PM
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Default Re: 2011 Civic engine vibration rpm fluctuating

Has a valve adjustment been performed? If so, when?
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