Erratic Idle Help!?

Hey everyone, happy new year, im having this problem yet again, my car will be sitting at 1k rpm's and ill watch the tachometer and it will bounce to about 1800 rpm's with barely any change to the sound of the idle, it does this very often. seems more often when the heat is on, i've replaced almost every vacuum line except pcv valve vacuum line, speed sensor. As im driving i can hear almost like a whistle/whine when I get on it a tiny bit coming from the middle/passenger side of the car. I was thinking maybe bad pcv valve and line? Been dealing with this forever and im just getting sick of it, power feels diminished a lot. Any help is appreciated, thanks guys.