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Hi guys,

I have been noticing a slight movement with my RPM at idle when car is warm and AC is on. There is slight vibration that comes and go as well when the RPM moves. It can be barely felt via the seats. Here is a video for the movement I'm talking about.

Do you think it's normal? If not, what can be possibly wrong.

Any suggestions are welcomed.

P.s car is stock with cat back FI exhust and has 90,000 km on. No errors found using ODB2 scanner. Spark plugs were changed 3 months ago. Injector along with throttle body were cleaned as well. Replaced 2 MAF Sensors, along with OEM alternator which died a month ago.
 

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Mine does not do that and I have 82K Miles on mine - so I dont think it is normal. This can be a side effect of variety of things as far as I know. A faulty sensor or a leak in the intake one of those hard to detect
 

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I had a ‘13 with 57k on it, it did the same thing.

I currently have a ‘15 COMP pack with 37k on it, it does it also.

Both rumbled the seat a small amount so I could feel it.
 
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