I have a 2010 Pilot that is idling normal but then will "bottom out" or in other words the RPMs will drop and then recover. This is only noticed while in park. I am not sure where to start. The Pilot does need a set of spark plugs but it doesn't seem like that is the problem. I am thinking fuel or some kind of valve/sensor problem. The Pilot is not throwing any codes at the moment. It is idling normal for the most part but will just stumble and drop rpms then bounce back up to normal. Any help will be greatly appreciated!

 

welcome to the forum. try cleaning out your idle cutoff unit. over time it gets dirty and needs cleaning. also put some seafoam in your gas tank, it helps to clean out the fuel system.