I think you are referring to the 'System Idle Process' in Win OS, which in the case of my Vaio typically takes up 90% of CPU capacity. Others who are supposed to know about these things say this indicates that 90% of CPU capacity is available for other applications. My own experience is that SIP voraciously consumes resources and actively blocks more useful work being done. In my VAIO, SIP thrashes the HDD mercilessly and only allows access to the laptop when SIP drops back to between 0% and 10%. Looks like the OS places a much higher priority on SIP than anything else. I've also found that formatting the HDD and starting again with a fresh install reduces the problem significantly, but SIP will eventually take over your life again. I have Norton Anti Virus running at all times for protection, so this is not a virus problem. Temporarily disabling Norton does not prevent SIP from taking over either.
Idle speed control
Idle control system RPM low
The idle air control valve on a 2002 Pontiac Bonneville is located on the intake manifold. This valve allows direct adjustment to the engines idle system.
P0507 : Idle control system, RPM too high.
The idle air control valve on a 2004 Trailblazer is located inside the coolant system. This valve regulates the air that comes into the cabin.
Idle speed control or Idle air control.
Idle control system, RPM higher than expected.
change your throttle positioning sensor located on the intake manifold
You may have a vacuum leak.
The idle is control by the idle air control motor from outputs from the Engine Control Module.
That fuel injection system does not have an idle valve. Everything is controlled electronically through the throttle actuator.
The idle control valve works by regulating the idle speed of the engine. The idle speed of the engine is usually controlled by the engine of the computer.