Genesis ≈500rpm idle and (perhaps) rough idle

[DLS_0]

Hi,

I am a new owner of a 2012 Genesis 3.8 with 40k miles on it and I noticed that, once the car is warmed up, it idles at around 500rpm and the idle is kind of rough.

Is that usual for a Genesis? If not, what should I be looking out for?

Also, what could I try to smoothen the idle ? My first fill-up was with 91 premium but did not notice any changes. I read on this forum that GDI injectors cleaner might help.

Thanks in advance!

 

[G-919431]

Make sure last oil change they didnt use a generic oil filter can cause a rough idle supposed to use OEM part.

 

[toxicavenger70]

It should be around 900-1k when warm. I would take off the throttle body and clean it. Then add a can of Chemtool B12 to a full tank of gas and run it.