There is not one, It is not adjustable, It is controled by the computer.
You need to clean and check the idel speed control seinoide.
That is screewed into the left side of the TBI kinda towards the back. It is about 4 inches long and has an electrical plug pluged into the end of it.
I think a 1 inch wrench will unscreew it. Just clean it with carb. cleaner.
You can adjust the idle from the throttle body. Replacing the throttle body might have accidentally change the idle speed. The idle speed adjustment screw can be turned either way to raise or lower the idle.
There is an adjustment screw on the side of the throttle body that adjusts how open the throttle body sits.
There should be a screw near the end of the throttle cable on the throttle body.
its located on the throttle body
It is a large slotted screw located on the throttle body.
It's usually next to the throttle body
there is a adjustment screw where the throttle cable attaches to the EFI throttle body.
on throttle body next to Idle control valve.
There is no idle adjustment. The idle is controlled by the ECM. You may have vacuum leaks causing incorrect idle speed. The gasket between the throttle body and the intake manifold was known to blow out and cause a vacuum leak.
On a 2001 Chevy Lumina with a V6 engine, the high-speed idle control is typically managed by the throttle body assembly. The idle air control (IAC) valve, located on the throttle body, regulates airflow and adjusts the engine's idle speed. You can find the throttle body on the intake manifold, near the front of the engine, connected to the air intake system.
This is controlled by the PCM, there is no adjustment other than cleaning the throttle body and the idle air port inside it.
Fuel mixture can not be adjusted it is computer controled.You can adjust the idle by removing the cover where throttle cable attaches to the throttle body and turning adjustment screw