Idle Problem
 

Hi I was wondering if I could get a little help with my car. When at a stop, about half the time, my idle is fine, but the other half of the time it idles REALLY low and the whole car starts shuttering. As far as I know, the plugs are still good. The only code I get is intermittent, and it is the O2 sensors. The previous owner had every service possible done at the subaru dealer. I have no idea what's wrong and was wondering if anybody had any ideas.

Unplug both O2 sensors and see if the car runs properly then came back to me.
Tony

O2 Sensor Location
 

I'm having a little trouble finding the O2 sensor plug to unplg them. Could you pleas post either a pic or descripstion about where to actually find them. According to what i can find, i have to remove the exhaust manifold, and i don't want to have to do that because i've never done that before.

Here is a photo looking down into the engine. You can either unplug it from above or below. It can be tight, so use a mirror. Good luck.

Sorry, I forgot the photo.:D