Where is the PCV valve located on a 2002 Ford F-150 4.2L V6 was told that there is'nt one?

I was told the same thing....There IS a pcv valve and it can only be purchased from the dealer. Go to the normal spot for a pcv valve (passenger side valve cover near the firewall) There will be a hose connected there, follow that hose to where it connects at the other end. That is the pcv valve. it also has two smaller coolant lines attached and is held in with two screws.