Ok I know the gist of the PCV valve operation (or I thought I did)
couple of questions...

With all the talk of PCV on 4.7 engines and with my Durango and using some oil mysteriously lately (which is not showing up on the plugs) I thought it was time to clear the water on a few questions.

1. Should a PCV valve have full vacuum present on the motor side of the valve at IDLE, or should it be sucked closed?

2. What are the symptoms of a stuck open PCV?

3. Does anyone know if the PCV on a 02 Durango is spring loaded or is it just a "rattle" valve?