Originally Posted By: possum328
Does it matter that I was wondering if the increased PCV flow would affect idle, not the air filter?
Depends on some specifics of the vehicle. If its a speed-density system that goes into closed-loop mode at idle, then excessive PCV flow will tend to lower MAP, raise the idle speed, and the IAC will close up to compensate, but overall the mixture should remain correct and I wouldn't expect much change in idle quality. If its a mass-airflow system or any system that stays open-loop at idle, then excessive PCV flow will look like a vacuum leak and tend to lean things out, potentially causing idle issues.