(Otomotiv) A screw found instead of the idle speed screw on some carburetors. It allows air to enter the carburetor when the throttle is closed so that the car can idle
(Otomotiv) A screw located on the outside of the carburetor that controls the proportion of the fuel/air mixture. It's now illegal to adjust these if limiter caps are present
(Otomotiv) A screw located at the bottom of the carburetor on the outside that keeps the throttle from closing completely when the car is idling, thus controlling the idle speed. See also idle air bleed screw, idle mixture screw, idle stop solenoid