I am just finishing swapping a 2.0 Duratec in my 2007 Focus 5 speed wagon.While the engine was out I replaced the high pressure power steering fluid line which had major surface rust.The pump is fairly new as well, about 2 years old. After getting the engine in I topped off the PS reservoir over the course of a few days before I started the engine. I started it a couple of hours ago and ran for a sec. When I looked at the engine the PS fluid was coming out from under the cap like a strawberry milkshake volcano. I took off the cap and grabbed my vacuum pump to fight the eruption. I let it sit a bit and started it again. Same deal. I've never seen PS fluid foam like this before. Anyone have any insight or suggestions? PS - There are no leaks anywhere I can find.