How do you clean the icv?

[clydesdale]

Mine hums with the key on. I am not sure if it is working correctly though. I sprayed wd40 insearch of vacuum leaks and I can find none. But my car will intermittently idle up to 2000 rpm or so and then fall back down. I am looking for ideas. Thanks

[e30 Luv]

You can find this info easy with a search. But just pull it off and spray it out with carb cleaner until the liquid flows out clear. Let it dry out and reinstall.

[redhatpat]

It's supposed to buzz/humm with ignition on.

You can also plug up one of the two holes, spray in a bunch of carb cleaner, cover up the other hole and shake it around pretty good to clean it. Then spray out again to get rid of any remaining junk in there.