I have a 2003 Ford Focus with a 2.0 L engine and Single Overhead. My air filter is filled with oil and my fiance took it to be looked at it and the mechanic said the PVC Valve needed to be replaced. I have a book that shows where the PVC Valve is and I still cannot find it. I have looked online and to no avail. Could someone please explain to me where it is, show me a picture, etc? Any help is greatly appreciated.