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The intake plenum is simply the top of the upper intake manifold, where the throttle body is attached. It is made of black plastic.
Pull off the upper intake plenum and you will have access to the plugs and wires.
very carefully
Behind the intake plenum.
You have to remove the intake plenum air chamber to get to the 3 plugs against the firewall. It requires to buy intake plenum gaskets and go ahead and replace the PCV hose on the back of the plenum. Need to get from the dealer. Gaskets also from dealer.
remove upper intake plenum
Which plenum-intake or. . . .
You have to remove the intake plenum. It just unbolts.
The PCV valve is located on the back side of the intake plenum.. When facing the engine, locate the second intake from your right. Run your hand to the back side of the intake plenum. The PCV valve is screwed into the backside. Start the engine, disconnect the hose from the valve. You should hear the air from the valve. Stick your finger on the hole and you should feel the vacuum on a good valve. If not, replace it.
it is on the back valve cover, you can't see it unless you remove the intake plenum.
The plenum is the intake manifold.
The intake plenum on most cars is bolted directly atop the intake manifold. This is where the air goes after passing through the throttle body.