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It's in the big rubber engine air intake tube , not too far from the throttle body
It's between the engine air filter housing and the big rubber engine air intake tube
The big rubber engine air intake tube will go from the engine air filter to the engine throttle body
PVC valve is inserted in the valve cover and connect to the intake manifold using rubber hose.
As long as you can seal the ends and route it, there isn't a problem using it. It will survive the engine heat. There are rubber connectors available for plumbing that could be used to connect the ends to the filter box and the intake.
Installed into the big rubber engine air intake tube close to the throttle body
On drivers side under the back of intake manifold. Big black rubber hose goes under manifold. hard to see but can be found.
On a 1997 Ford Ranger : The Mass Air Flow sensor is INSIDE the round plastic housing between the engine air filter ( cone shaped ) and the big rubber engine air intake tube ( you will see where the wires go inside the plastic housing )
A large radiator type clamp that unscrews to take it loose so the rubber intake hose can be taken off.
The engine air filter is in the engine compartment , at the front , on the passenger side ( then you will see the mass airflow sensor , the big rubber engine air intake tube that connects to the throttle body )
Yes, the 1989 Ranger does have a PCV valve. I can speak for the 2.3 liter 4-cylinder version only. If you stand on the driver side of the engine compartment you will see the intake manifold (silver cast looking with the name FORD on it), on the bottom of the intake there is a 90 degree elbow (the intake forms a "Y" and if you look through the "Y" you can see the elbow) that points back toward the firewall. Connected to this is a rubber hose that routes back toward the firewall and then turns down at the firewall-side of the intake. If you follow this hose along you will come to the PCV valve. The valve is installed in the hose and connects to another rubber hose on the other side of the PCV valve. Hope this helps.
In the big rubber air intake tube , not too far from the throttle body