Bad PCV? Idle issue

Car has done something odd randomly several times this year but yesterday the issue stayed and almost left me stranded.

It's a 440, 950 proform.

Drive it down the road it runs perfect. I come to a light and it acts like it will stall. Throttle it lightly and it would improve and go away.

Yesterday it actually stalled and acted almost flooded on re-start. When it would almost stall it seemed like maybe a vacuum leak. I checked PCV since it's the only vacuum port/line being used. If I plugged it would drag the idle down. If I unplugged it the idle would go up to like 1100. I shook it and it rattled a lot but when I tried to breath through it acted funny. Went and bought a new one and they sound and work different.

I also noticed that lately my warmup time has decreased and it smells rich when backing out of the garage.

Tonight I'll try the new PCV and see what happens.

I was wondering what your guys take on these symptoms are.