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Idle is computer controlled and is not adjustable.
Idle speed is not adjustable. It is controlled by the engine copmuter. If your idle speed is too high or low you have a problem with a sensor or the idle air controll actuator. Also, a weak battery can cause the idle too be erratic
If your engine has a carburettor turn the idle adjust screw so the idle is at the proper speed. If your engine has fuel injection the ECM controls the idle.
To find the idle adjust on a caterpillar 3406 engine refer to the owners manual. If this doesn't help, contact the manufacturer.
You adjust the run and idle speed with the governor wire...loosen the nut and adjust it.
on throttle body
you can't, it is not adjustable.
To set the idle, adjust the carburetor.
How do you adjust the idle speed on a citroen berlingo 1.9d (basic diesel engine)
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.
With the engine running, turn the idle screw until you get the speed you want.
My engine is idling too high. How do I adjust the idle speed?