PCV valve is located in the valve cover. start engine, allow to idle. disconnect pcv valve from valve cover and feel for vaccum. If you feel vaccum good, if not trouble shoot system. Pcv valve dirty, hose clogged or cracked, etc. check the rubber grommet in valve cover for deteriation, replace if necessary. if the old pcv valve is clogged the the hose may be as well, clean w/ solvent. install new valve and reconnect.
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