Noisy Idle Regulating Valve? Bad?

[CaliDohBoy]

While fixing my wife's car this weekend (Bad CPS) I noticed a buzzing noise from the engine bay. After sticking my ear next to hot engines and moving parts I found that it was coming from throttle body area, namely the Idle Regulating Valve. Anyone else notice this? Is this bad?

Here is a pict for reference:


Thanks.

[DeadpaN]

That's normal. Even with the engine off, but power on, it should buzz; otherwise its not working. (according to Bentley and Chilton manuals)

[biorjin]

You can try cleaning the idle control valve with some sort of carbon cleaner, or replacing the hoses (there should be 2, $20 total). Replacing the valve itself will be last thing i wanna do as it is kinda expensive (about 200 bucks)

[campaiar]

I think mine is going. My ti isn't idling very well right now, and the buzzing noise is really loud.

I need to clean it out first I guess.

[Mothman]

I have a sound that is not buzzing more like bells rotating very fast, but only when my idle is under 1500rpms', but once I add power the sound goes away. When I had my smog check done, THANK GOODNESS it passed, but the service guy told me that my computer was monitoring all four cylinders! for a missfire. He told me watch for the check engine light. Sure as heck, 528miles later the check engine light came on. So I took it to a service guy i know (trying to get a hook up!) He told me that it was an error 74, and that he can not find the vaccum leak!

Any ideas?

Thanks,
Mothman

[DeadpaN]

I'd recommend getting some new upper intake manifold gaskets, about $2 each, need 2, and remove and clean intake. Planning on doin it soon because there is this one vacuum line-with a braided sheath-that insert below the ICV and I can't see where it goes to. Take off the manifold and inspect the hoses for your best bet. Also, I just got random misfire readings on my car too! Totally random, cylinders 2 & 4, I'd clear the code and checking it everyday, it'd only occur once every week or 2. Replaced spark plug wires, no more codes.

[Mothman]

Thanks will do!

[BMR82]

I also been hearing that sound. So all of that buzzing sound is normal, cuz i was getting all worried already