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At the base of the carburetor are 2 screws. One adjusts the idle speed and the other adjusts the idle mixture. Screw the idle mixture in until the engine starts missing then screw it out 1 turn. Then, adjust the idle speed screw to about 850 RPM.
To adjust the idle on a 2005 Honda Civic locate the idle control valve. The IACV and is found near the intake manifold. Open the top of the valve and tighten it to lower the idle or loosen it to raise 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
you can't its computer controlled, unlike the old carburetors with an idle air mixture screw to adjust, its set by the factory and you can't screw with it
Actually, it should be don e with a vacuum gauge, to maximum vaccuum. Without one, adjust the idle mixture to max., idle.
The air mixture screw does that.
Check idle speed rpm & adjust higher if lower than it should be. Mixture if it isn't.
Start at 1 1/2 turns from seat and adjust until you get the best idle
Start at 1 1/2 turns from seat and adjust for best idle
I don't believe it can be adjusted manually. Its controlled by the computer.
does the engine have a carburetor or is it fuel injected? A carbed engine has mixture screws along with a base idle screw, a fuel injected engine the idle is computer controlled.
You adjust idle with idle timing