2002 Ford Ranger 4.0 passenger valve cover nipple
The nipple on passenger valve cover has an open
ended hose. Does anything suppose to be on the
end of the hose? Filter, valve, etc? Or does it attach
anywhere?
It goes somewhere. My guess is that it is the PCV hose. If it is the PCV hose it will go to the intake system. How about a photo?
Ok. I will post a picture. PCV valve is on drivers side back end of the valve cover.
I think I figured it out. There is an opening on air intake hose.
Does anything go from that hose to the intake tube? I found the exact same issue and Napa sold me a PCV valve with the rounded metal tubing that looks just like the one on the drivers side valve cover. I remember removing a pice of plastic but it wasn’t a uni-directional air flow pipe like the PCV valve. I was throwing a check engine without it and now I’m not, so this makes no sense unless the design is to have 2 PCV valves on both valve covers? Where you’ve shown the soft rubber elbow connected to the nipple coming off of the valve cover, that’s where I placed the PCV valve. I just realized that the driver side valve cover has the exact same part and has hoses going to the radiator around the firewall and down the passenger side to the lower end of the radiator. The picture of the elbow alone goes to the intake. The cheap hard plastic is what I removed because I totaled my 04 XLT 4.0 V6 e engine and expected all to match, but it doesn’t. Totally different size but 6 wire MAF sensor w/same color wires. If I pull the PCV and just run the Soft rubber hose to the intake the check engine light comes on. With it no CEL. I wish I still had the hard plastic insert as I would put that in to see. It seems that the flow needs to decrease by a smaller hose connection. But that doesn’t work if you extend the elbow shown to the intake port (small metal tubing on K&N 77 polished and ported stainless tube). I’ve posted pics, any help would be greatly appreciated since it says you figured it out. Blue is the PCV, red is the elbow shown above. Thank you!
Here is the port on the intake circled in green that the elbow is supposed (I understand to be) to connect from the passenger side valve cover.
