Change the pcv valve in the valve cover.
4.0L does not have a PCV valve, it uses an orifice in the rear of the valve cover.
The picture can be found at any online parts site. Look up the 94 Quest PCV valve, and there will be a picture of it.
where is the pcv valve located 1994 nissan pick up 4wd 2.4l
No, it's not.
The Wrangler uses a fixed orifice system. There isn't a pcv valve. The tube coming from the center rear of the valve cover is the orifice.
its located on the intake manifold close to where it connects to head There's another PCV located under that.
it is located on the driver side valve cover in the back may be easier to get to from the inside
== == I'm not sure. I have a 2000 S10 4cyl. and I can't find the PCV valve. The only thing coming out of the valve cover is a short 90deg. hose that connects to the air intake box. Does this engine have a PCV valve? I'd appreciate any info. == == I don't know about the 2000, but the 94, the PCV valve is underneath some throttle linkage. At the front of the engine, you'll see the radiator hose, then an AC line, and underneath a plastic shroud, you'll see another hose. Take off the plastic shroud by removing the screw at the top of the shroud. The PCV valve is held in by a screw fitting, back it off and you'll find the PCV, pull it off the hose attached to it and replace.
It should be on the top of the valve cover , on the drivers side of the engine , near the end towards the firewall
may i ask what size engine it has? The 4.0 six has no PCV, but uses a small hose from the back of the valve cover to the intake to perform that function. The front hose is a fresh air inlet from the air cleaner. Additional Info: If you are running a V8, the pcv valve is the plastic gadget poking out of the top of the valve cover with a 3/8" (?) hose connected to it.
Check for vacuum leaks and/or a bad PCV valve.