A bad idle air control sensor or a bad throttle position sensor.
The idle is control by the idle air control motor from outputs from the Engine Control Module.
The idle air control valve on the Chevy Colorado actually controls the speed of your engine's idle. The valve is sometimes called the idle speed control valve.
The idle air control valve is a stepper motor which regulates the amount of air entering the engine during idle and other times during an engine's run period, such as deceleration, or when the A/C compressor is in use.
You don't. The ECM (Engine Control Module) maintains the correct idle speed. If the idle is out of control you probably have a vacuum leak.
On idle speed control actuator is located on the front of the air intake plenum
it controls idling of car engine, without it it will not idle..
98 chevy lddle control valve
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Idle control sensor on the driver side strut tower. The cover should be blue.
It could be the Idle Air Control (Idle speed control) valve. Its located on the left side of your TBI and has an electrical connection.
check the ait. on yhe left side of carb..it control's idle.