Its on the rear of the passenger side valve cover if's it's a V8. Remove the doghouse and you will find the vacuum connection for the PCV on the very rear of the intake plenum. Follow the hose down to the PCV valve.
Standing in front of the engine, its on the left side of the engine intake. You'll have to remove that MAP sensor to get to the PCV Valve.
Generally you will find a PCV valve somewhere on one of the valve covers, with a hose the connects to it.
Most are locatedon back of your intake in the middle.
I have an 88 elite econoline motorhome, I'm having a problem swiching over from 12 volt to 110.
It's going to be off the valve cover(s) one or the other. Plugged right into it.
front side of plastic intake manifold
Replace: Plugs and wires Fuel filter Air filter PCV Valve Dist. cap and rotor
It should be on top of the valve cover on the driver side right where you add oil. The oil cap is at the end of the valve cover towards the back of the engine and the pcv valve is on the same valve cover but towards the front of the engine. It sticks out of the valve cover just like the the oil cap does. I have the exact same year and model car as you and that's where mine is located at.
I believe that it is right on top of the valve cover, a (little short 90 degree hose) goes directly to the air cleaner. It comes out forward of the air cleaner.
there is a pump in both tanks, as well as a high pressure and a low pressure pump on the body and under hood
UNDER HOOD, CENTER, UPPER ENGINE AREA, TOP OF ENGINE, MOUNTED IN PASSENGER SIDE OF INTAKE MANIFOLD
Hi I use to drive a 87 van and recently bought a 88 so I am pretty sure that it is the same but you push the blinker lever forward. Hope this helps.