A couple months ago I started to notice a rough idle when the car comes to a complete stop. (The car has 30,000 miles)The rpms shoot up a bit and drop back down to normal. It only happens when the car is warmed up, comes to a stop, and when I turn the steering wheel when I am also at a stop. The car also feels like it wants to stall out at times when it rough idles but doesn't. I was under warranty and I took it to two Subaru dealerships but both still can’t figure out the issue. They replaced the MAF sensor, MAP sensor, oil control valve and the problem still persists. The car has not thrown any engine codes. The car is stock with no performance mods. Has anyone ever experienced this or knows anything that can help out. I figured it could have been a vacuum leak but wouldn’t the dealership look for that too? I have a video of what the car is doing I just dont know how to upload.