Power fc
broken air intake after the air filter and the mass air flow censer. connects to throttle.
go on line search Mazda parts
The idle air control valve is on the the bottom of the throttle body.
ckeck for vac. leak at brake booster
Start with a full tune up including fuel and air filters, spark plugs, ignition wires, distributor cap and rotor.
changed the air idle control solenoid
Could have a bad motor mount
If you look on the underside of your hood when it is open there should be a sticker that tells you. Usually between 650-750 rpm
To adjust the idle on a 1981 Mazda RX-7 with a 12A engine, locate the idle adjustment screw on the carburetor. Start the engine and let it warm up to normal operating temperature. With the engine running, turn the idle adjustment screw clockwise to increase idle speed or counterclockwise to decrease it, aiming for a target idle speed of around 800-900 RPM. Finally, check the idle quality and make minor adjustments as necessary.
To adjust the engine idle on a 1990 Mazda Miata with a 1.6 engine, locate the idle adjustment screw on the throttle body. Start the engine and allow it to reach normal operating temperature. Then, use a screwdriver to turn the idle adjustment screw clockwise to increase the idle speed or counterclockwise to decrease it, aiming for an idle speed of around 850 RPM. Always double-check the idle speed with a tachometer after making adjustments.
To raise the idle on a 1993 KZ1000, locate the idle adjustment screw, typically found on the carburetor. Turn the screw clockwise to increase the idle speed. Make small adjustments, then start the engine and let it warm up before checking the idle. Always ensure that the throttle cables are properly adjusted and not binding.
http://www.geocities.com/adamk01452/IAC_Clean.html this will refer to cleaning you IAC (Idle Air Control) valve.