Don't quote me as I have a Gen 3 ('94 LE) but for me, I just remove the clamp from the hose that goes into the PCV valve and then just yank on that thing. A little twisting action here and there and that bad boy came right out. I banged the back of my hand on the intake manifold and cursed lightly

but you should be able to do that. I mean, PCV valves don't screw on, they just slide in. But, then, I have a Gen3.
But.. hold on... you got a 4 cyl so you have my engine, the 5SFE block. It should be a simple hard pull on it. Pull but if you are scared of breaking it to the point where it could be stuck broken, then pull from the rubber "boot" part. Pull, twist, then shout

It should come right out... Write back to see if you got that thing out...
Edit: Remove the clamp AND hose so you are pulling nothing but the PCV valve itself. I'mma go tug on mine just to make sure that I gave you the right directions
Edit some more: Yup, right on the money. Twist and pull and it should come right out.. Watch your hand as I just about banged my intake manifold some more