If you have a vacuum leak it will cause the engine to stumble when you give it gas because it'll create a lean condition. A PCV valve that is stuck closed will cause you issues, but ticking noises isn't one of them.
Double check the "Elbow" you installed to make sure it's seated correctly and didn't crack during installation. Remove the PCV valve and shake it. You should hear the valve inside shaking freely. If not, replace it. As for you ticking noise, this could be worn lifters, valve guides or timing chain. There's no way to tell for sure without checking the engine. But with so many miles, it's probably showing its age. Nothing last forever. Just keep changing the oil and keep it tuned up.
Tuesday, February 8th, 2011 AT 11:15 PM