it seems there a small screw back of the intake but the idle is control by the ecu.
Hyundai accent idle speed
It is just next to the TPS (Throttle Position Sensor) on the intake manifold.
how to adjust idle on 2001 legacy
you can adjust it via the idle control valve.
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.
If it has EFI (Electronic Fuel Injection) there is no idle speed adjustment. The idle speed is adjusted electronically.
With the engine running, turn the idle screw until you get the speed you want.
Idle speed is PCM controlled and is not adjustable.Idle speed is PCM controlled and is not adjustable.
I had the same problem and it turned out to be the fuel purge censor
Idle speed is computer controlled and is not adjustable.
You adjust the run and idle speed with the governor wire...loosen the nut and adjust it.