The IACV is #17, it's on the back of the intake manifold, against the firewall.
The FITV is #13, it's on the underside of the throttle body.

Either one or both can be dirty, sticky, whatever. I think there's coolant in both, so be prepared for that when you take them off. Hasn't happened to me, but I guess sometimes the guts of the FITV can come loose causing a surging idle.

Still, don't forget to look for vacuum leaks.

background info...
The ECU controls a steady idle by telling the IACV to open & close as you turn different loads on & off. The fast-idle thermo-vavle (FITV) is supposed to let some air past the throttle to increase idle speed when the engine's cold. The FITV is supposed to stay completely closed once it's warmed up.