how to adjust idle on 2001 legacy
you cant there is an electronic throttle position sensor that controls idle may be bad
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.
Its probably has a vaccume hose leak.
To adjust the idle setting on a Volvo 740 estate wagon, first, ensure the engine is warmed up to operating temperature. Locate the idle adjustment screw, which is typically found on the throttle body. Turn the screw clockwise to increase the idle speed or counterclockwise to decrease it, making small adjustments and checking the idle speed with a tachometer. Finally, ensure that the adjustment is within the manufacturer's specified range for optimal performance.
Controlled by on board computer, not adjustable. But look for vacuum lines that may be damaged, cracked, or unhooked- that will greatly affect idle.
Idle speed is controlled by the Electronic Control Unit and is not adjustable by the consumer. The question is why you would even want to mess with this on a car that is under warranty?
The idle for a 1986 Honda Accord is adjusted by a idle air control valve. These function by either tightening or loosening the valve. This controls how much air is allowed into the system, more air means higher idle and less means lower.
You cannot adjust the idle in a Legacy GT, it is fuel injected and computer controlled. It should adjust automatically. If your idle is very high, or erratic, check for vacuum leaks and check the IAC (Idle Air Control valve) Sometimes the IAC just needs cleaned out with some carb cleaner, and it will be fine. Do some Googling for more info.
You adjust idle with idle timing
Adjust idle on Mitsubishi diamante
To adjust the idle speed on a 1986 Honda 250 four-wheeler, locate the idle adjustment screw on the carburetor, which is typically found on the side. Start the engine and let it warm up, then turn the screw clockwise to increase the idle speed or counterclockwise to decrease it. Adjust until the engine idles smoothly without stalling. Always ensure the adjustment is made in small increments and check the operation after each adjustment.