Hello all, lately I've noticed while sitting at a red light the rpms drop to about 400 which causes the car to vibrate just for a second before going back to 600. I've noticed that it tends to do it when the a/c is on. Never really noticed it doing this in the 3.5 years I've owned the car, but maybe I'm just paranoid. Anyone else have something similar? I'm trying to decide if this warrants a visit to the service center

 

Have you cleaned the throttle bodies, because they are known to get dirty and cause idle vibrations

 

I've brought this issue up to my dealer before and they said everything was fine. My car is at the dealer as we speak getting an oil change and they reported back that the car is in perfect condition with no issues. I too, didn't notice this until the car is about 2 yrs old.

 

do a throttle body service or possible and idle relearn on it...if its under warranty take it in and have them check it out.... be careful on cleaning you TB if you touch that flapper youll need to replace them... good luck

 

I had that happen to me before (different car). One of my plugs wasn't firing.

 

Had this happen on my 11' coupe 1 1/2 yrs into it. Drove me crazy but then it got stolen. My 13'sdn hasn't done it yet we'll see. Search button will take u to a couple of threads about the same thing.

 

I had the same probelm with rough idle at red lights. I cleaned the throttle bodies and problem solved. Search for DIY throttle body cleaning. Its pretty easy to do it your self but just be careful. Dealer should know whats wrong which is weird.

 

Just cleaned the throttle bodies, the idle seems to be solid now. Lets see how it holds up. Thanks guys!