It is controlled by the computer and is not adjustable. If it is so slow that the engine wom't idle the idle control solonoid needs cleaning. It is attached tothe throtle body and clean it and where it mounts with carb cleaner. Also clean the inside of the throtle body where the throtle plate is as a carbon ring forms there.
The idle speed on a 1987 Chevy Celebrity is controlled by the engine computer, there is no way provided to adjust it.
You can not adjust the idle screw, it is sealed off at the factory. If you are having a high idle problem check for a vacuum leak or a bad idle air control valve. These will commonly cause a high idle.
how to adjust idle on 2001 legacy
You don't. The ECM (Engine Control Module) maintains the correct idle speed. If the idle is out of control you probably have a vacuum leak.
under routine tuneup, you dont. engine idle speed is controlled by the ECM automatically. HOWEVER, if during a rebuild of the throttle body, there is a base idle speed adjustment screw that is capped and sealed at the factory. Adjustment of this screw is not usually required. if there is an idle speed problem first check for vacuum leaks followed by a dirty or malfunctioning idle air control valve (this will set a check engine light usually)
May be computer controlled and not adjustable
you can adjust it via the idle control valve.
It could be the Idle Air Control (Idle speed control) valve. Its located on the left side of your TBI and has an electrical connection.
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How do you adjust the idle speed on a citroen berlingo 1.9d (basic diesel engine)
you can`t adjust the idle speed manualy,it has to be done through the ecu via a main dealer diagnostic computer.
82 to 94 as per a haynes manual, auto trans: 700 rpm and manual:750 rpms.