[Ryland]

Nope, the VX does not have an idle air control valve and there for does not have the idle bounce that comes along when that valve wears out, but what it does have is a little rubber grommet on the crank case breather box that after 15 to 20 years gets dried out so the little plastic fitting that sticks in it no longer fits right, it's a common problem that nearly everyone with a civic vx that I talk to has and it's fixed with a $3 part from the dealer (not sure if the auto part store can get it or not, but the part from the dealer is good for 15 years!!!), it takes 5 minutes to replace, you need a pair of pliers and someone with small hands to reach under the intake manifold to pull out the old one, if you want to be sure that it's really this grommet before investing $3 in parts, you can buy a $2 can of carb cleaner to spray down there but at that point you've made a 2nd trip and after you count gas to go to the store you've doubled your investment in the repair.
You can be sure that it's this grommet if the idle bounce goes away when the engine is at fast idle, such as when it's cold or when the a/c is on (a/c turning on kicks in the fast idle), at fast idle it creates a higher vacuum and the loose fitting part gets sucked in, sealing the gap/vacuum leak.