anyone know where it is? i want to replace it, but i cant find it

 

It will be located on one of the valve covers, it should have a rubber hose that goes to the intake or throttle body somewhere. If you don't know what it looks like get a new one, ask at the counter of a parts store they can look it up on the computer and grab it off the shelf for you. if you want to look for it from their look for it, if not ask them to show you where it goes, if they know anything about cars they will find it fairly quickly.
Generaly if you take it out and shake it and hear a rattle it is still good.