thunderlips

Just bought a stock Vx and have some issues that i'm hoping to resolve. The idle is slightly rough, and coughs occasionally when accelerating. Also when screw the idle adjusting screw higher and then rev the car the rpms dont wanna come down until i screw it back to the low idle. (btw what should the idle be for a 93 stock VX?). I tried checking for vac leaks (dont really know an accurate way) and cleaned the IACV. Looked for the FITV to clean it and didn''t know how to locate it. Does this car even have a FITV? My other problem is my horn isn''t working, it just makes a click sound; where is the horn located?