Nissan Xterra PCV Hose moves crankcase fumes into the intake for combustion instead of escaping. The molded PCV Hose connects the crankcase to the spring loaded PCV valve, whose sliding pintle meters airflow and maintains proper pressure. The hose therefore cuts emissions and safeguards Nissan fuel efficiency. Throughout first and second generation Xterra models, the layout stayed consistent, a short rubber or reinforced plastic line running from the valve cover to the rear mounted valve, so drivers will not encounter radically different PCV Hose versions. The changes from year to year mainly shift the path. Early trucks take the driver side, while later ones loop across the passenger side to clear added hardware. Whichever route you take, a tight direct fit is essential, as any split PCV Hose disturbs the air fuel ratio, creating a rough idle, excess hydrocarbons, and poor mileage. The PCV Hose is inexpensive enough that many owners change it whenever they change the air filter so that every Nissan Xterra can breathe freely and remain on the road.
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