I replace my PCV valve once a year whether it needs it or not. The last changeout was around 6 months ago. Today I pulled the PCV valve out of the hole that it plugs into in the valve cover and the engine did not rev up like usual when the PCV valve is pulled out. I put my finger over the hole on the bottom of the PCV valve and it was sucking air into the PCV valve. However, when I pulled the PCV valve off of the rubber angle-shaped boot that connects it to the hose that goes to the engine, the engine revved up very much. I then wiped the PCV valve off, placed it into my mouth, and blew into both ends. I was able to blow air through the PCV valve in both directions, but I always thought that the PCV valve would not pass air both directions. Am I correct about this? I shook the valve back and forth and I could hear the plunger inside the PCV valve going back and forth as I was shaking it. Although this is a fairly new valve, is it likely that it is bad? This is on a 94 Corsica with a 6 cylinder engine.
- posted
17 years ago