The idle speed control solenoid controls the idle of the engine when the air conditioning is engaged. Since the ac pump draws down the engine idle the solenoid increase the idle when the ac is on.
there is no "fast idle solenoid" there has'nt been a fast idle adjustment on passenger cars in over 20 years
1994bmw318i check the idle soleniod
The 5.7L does not have an idle solenoid. The idle speed is controlled by the throttle plate opening via its internal motor.
May have an idle solenoid on the left side of carb.
It is not adjustable. It is computer controlled. If idle speed is incorrect you have a vacuum leak or a sensor/solenoid issue.It is not adjustable. It is computer controlled. If idle speed is incorrect you have a vacuum leak or a sensor/solenoid issue.
I believe that kicks on when the AC is turned on to raise the idle to compensate for the AC compressor load.
The fast idle solenoid
Problem is related to idle solenoid. As you come to a stop the throttle closes. There has to be a bypass to allow air to flow into the engine. This is acheived via an idle solenoid valve located somewhere to the intake manifold and it is controlled by the computer.
The Idle speed control serves a few functions such as increasing the idle when the vehicle is cold to keep it from stalling. It also responds to increased engine load such as when you turn on the air conditioning or turn the steering wheel at idle. Without the idle speed solenoid the vehicle would stall nearly every time you came to a stop.
There is usually a solenoid that boosts the idle when A/C is turned on. If the car stalls when solenoid disengaged; the curb idle adjustment is off. Find the screw and give it a half-turn CW. Or, sometimes the end of the solenoid is the curb-idle adjustment . Put a wrench on it and try giving It a half-turn clock wise.
There is an "Idle Air Control Valve" on the passenger side of the intake, a "throttle switch" on the drivers side of the throttle body, and "idle solenoid, idle control" on the drivers side of the intake