I am having a hell of a time trying to remove the PCV valve on my 90 b12. Since the valve itself is down below the intake manifold, it makes it that much more difficult to remove with all the hoses and such in the way. I have tried spraying the valve with wd40 but to no avail. I doubt the PCV valve has ever been changed on the car as far as I know and it is clogged with gunk, as well as the hose that connects to the valve cover. Besides hesitation, what would a clogged PCV valve cause? Also, any advise what I could try and do to remove it, besides taking it to a garage???