I have some nice pictures of the EGR on a '93 VX, but I don't think the CRX HF EGR system is very similar.

But yes, it is a valve that usually gets clogged with carbon when it gets old. You can clean it out with carb cleaner or just replace it. If you're lucky, the guys who put in your engine just forgot to plug it in, you could check for that while you're in there.