knowing if pcv valve is still good or not?

I have heard that too, but also have heard that it can still be bad even if it rattles. Another thing, I have a Ford and was told by a few sources to only use a Motorcraft PCV valve. But for the price, I guess better just to change it every 10,000 miles or whatever it says in the book.

i been doing some research, and my friend told me that use carborator fluid and clean out my pcv valve. that just a fyi(for your information)

And your friend may be perfectly correct. I just don't know. I just figure occasional replacement is a safe bet with the low cost.

Now I think there was another test regarding pulling the line (with valve on the end) and then thumbing the valve opening to see if it is pulling vacuum or something like that. I know if "Timer" gets on he will know how to deal with the PCV valve. Might also search the auto maintenance forums at Bobistheoilguy.com for PCV valve.

thanks i did not know that info was also there on bobtheoilguy. thanks for all your help and any in the future,