wat does the pcv vavle do??

[cheadder.ep82]

curious my mates a toyota mac but dont know wat it does and cant solve my idle issue posts up about it

 

[Texx]

curious my mates a toyota mac but dont know wat it does and cant solve my idle issue

That's reassuring!

posts up about it

Have a read through this, it should give you a general idea of what the PCV system does and why it does it.

http://www.autoshop101.com/forms/h63.pdf


Possibly print out a copy to give to your mate.