The idle valve prevents the engine from running on after turning
it off.
Checking function: Disconnect one wire while the engine
is running.
The idle valve is good if the engine runs slower or unsmoothly.
A soft clicking noise must be heard when reconnecting the wire.

Disconnect wires.
Remove idle valve.
Note when fitting: Make sure that conical sealing surface
is in good condition.
Coution! Torque to 0.25 mkp (1.8 ft lb).