Possible PVC when they go they squeal?
Yup my PCV Valve gave a horrible squeal when that went..
replaced it and it was fine
how did your car act when the pcv was failing?
the idle raised and then dipped over and over again..... The driving was fine aside from the nasty squeal sound... It didn't affect performance but to be honest as soon as I experienced the idling and the sound I did a search and quickly replaced the PCV as I was worried about it doing any damage if I didn't
I'd have that sound without the p flo fitted though wouldn't I? or is it because the cover is off so the sound is now much louder