The idle is controls ONLY by the PCM. Replace your ECTS along with cleaning the Idle Air Control valve located on the throttle body.
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.
Idle air control valve diagram
There is a technical service bulletin for this problem. It's either the PCM (powertrain control module) or the Idle Air Control Valve
The idle control valve for your 1995 Nissan Maxima can be found on top of the engine. The idle control valve will be attached to the back of the injector fuel pump.
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.
The idle air control valve on a Volvo S80 is located on the intake manifold. The valve controls the rate at which the engine holds an idle.
Where is the fuel idle control valve for a 2002 Pontiac Sunfire
The idle air control valve will be located by the throttle body.
The Idle Air Control (IAC) valve is mounted on the throttle body
The 2002 Dodge idle air control valve is located on the outside of the air cleaner housing. The idle air control valve can be found on the left-hand side of the housing.
The idle speed is controlled by the computer ( PCM , Powertrain Control Module )