Thanks for all your help. Yeah it's misfiring. most of the time you can feel it lag back from accelerating, but some times it really runs rough. The passages in the EGR didn't seem to be "caked" up per say. I expected it to be dry, but it was wet. The Yellow stuff was puddled in the port to the motor, and was all in the EGR and in the port from the exhaust. I don't know if it was an oil mixture or what. I'm baffled. I hope there's not something seriously wrong with my car. I'll see if I can find my camera and take some pictures of it tomorrow...