I am used to the PCV valve being in the valve cover so I ran into the same problem myself on my 96 hardbody it is located down near the oil filter you will have to go in through the passenger front wheel well take off the splash guard and you may have to make a little room by disconnecting an electrical bracket and I believe it is a 19mm wrench.Hope this helps
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Follow the breather hose(s) to where they meet the engine and that is where the pcv valve is usually to be found if your engine has one; valve cover, crankcase or inlet manifold are the likely locations.
Not all engines use a pcv valve. Many engines just have a tiny hole into the inlet manifold which typically soon blocks and needs cleaning.
Ford was one of the manufacturers who in the early days of a pcv system being required, used an oil filler cap to attach the breather system to and the tiny hole was inside the cap along with the flame trap and oil mist filter.
That like many of the plastic pcv valves was intended to be a throw-away item.
We have two Nissan 200sx's, a 1995 manual and a 1996 auto. Both had this problem and both turned out to be the same thing. The "idle air control valve." It was most noticeable if you ran the air conditioner and then came up to a red light. You would have to keep pushing on the brake and race the engine a little to keep it from shutting off. Replaced that part and both cars have never had the problem again.
1997 Nissan pickup its just above the oil filter, lower right of engine, access through right front wheelwell after removing wheel, it's a screw to be removed.--------------------The pcv valve on the 2.4 l engine is located behind the alternator and the engine oil filter. The best way to change it is to go thru the wheel well. Take off the passenger front wheel, lift or remove the rubber splash curtain, remove the oil filter, disconnect the rubber vacuum hose, then use a 19 mm wrench to remove the pcv valve. ----------
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The PCV valve connects the crankcase to the intake manifold from a location more-or-less opposite the breather connection. Translation - The PCV valve on your engine is threaded into the intake manifold.
The PCV valve is located in the valve cover on the passenger side of the vehicle. The valve is closer to the firewall than it is to the front of the engine. It has a hose attached to it and threads into the valve cover.
Nissan Scope Technician- 10+ years experience is Nissan dealership
the pcv valve is behind the alternator between the alternator and oil filter. when you remove the oil filter you can see the pcv in the intake manifold. best way to get to it is through the pass side fender under the rubber mud flap thats between the wheel and engine.