[tirwin]

There are two Allen head bolts that have to be removed. 6mm I think. You'll probably need an Allen head socket on a swivel with an extension to remove it. That is the AAR though. The AAV looks like a flying saucer and is also under the air box on the right side. The AAV looks similar to the decel valve. The decel valve is further back and has a vacuum line that goes to the middle of it (if it hasn't been disconnected and plugged which is fairly common).

Maybe you're thinking the AAV is not closing. There is a test procedure for it posted in the CIS Troubleshooting for Dummies thread. You use a hand vacuum pump to test it.