OK - Now before telling me to search - I have. All of the info I have found is about another issue, or the issue was never addressed. There...now that is out of the way...

I am hearing a noise at idle in when sitting in the driver's seat. This noise sounds like a fan or even intake but not a whine, more like a rotating clunking. This is fairly faint and cannot be heard unless the cabin air system is off, windows are up and the radio off. It is ON 100% of time. Now, this noise isn't discernable when listening with the hood up (even sticking my head WAYYY inside the engine bay can't sort it out). I thought it could be the blower fan for the cabin air, the resonator on the intake or even the throttle body. I DO have a Berk intake on, but this noise has existed at the same level even with the stock airbox. Anyone else have this or know what i am dealing with? Thanks.

 

Try increasing the speed of the blower motor. If the speed increase changes your noise the culprit is the blower motor.

 

Do you mean for the cabin air system? Its OFF...however I have tried at variable speed with and without A/C - but thanks for the suggestion but thats not it.

 

I have a similar noise. I took it to the dealer and the just looked at me like I was an idiot

Let me know what you find out

 

The other night I heard it too, sounds like a clunking, but very faint right? I've also heard of such noise in a 1984 Dodge Caravan with the Mitsu, 2.6L L4 engine. After my brother took it apart to rebuild it as a high school project... we noticed the timing chain guides were, well, in pieces. So that's what was probably rattling on the chain. And if you rev it up, you don't hear it because the chain is moving faster or the engine sound is louder than the clunking sound. Of course I have a y pipe and Berk/Franken intake. So this may be the timing chain guides??? I don't know, but then another day, the noise went away? So I don't know what's wrong. I'm keeping my ears open... that's all I can say. I didn't bring it in to the dealer because I know they'll think I'm crazy, just like my A pillars rattling like someone poured metal shaings down it and when I hit a bump, it would make buzzing sounds. Of course it only does that when it's cold and not hot. So I'm thinking that noise is probably something stickiy in there and when it gets hot, it just melts to the metal and not buzzzz.. When cold, well you can figure that out....

 

For my problem/noise I don't think it is the timing chain. That is the far right of the engine bay and I think I would hear it with the hood up. "Clunking" my not be exactly the right term either. I want to see if I can isolate before taking it in as I will need to put the stock airbox back (because I don't want stupid excuses). I am leaning towards the throttle body area possibly being more noticeably loud since the Berk intake...though I could swear that I heard that before....

 

it kinda sounds like as if a jet is flying above.


it sounds like something is constantly rubbing on something.

i haven't figures it out yet.

 

Artic: Yeah... a very quiet jet
You know guys (and gals , if any are around!) I think a big reaason why we don't hear it with the hood open is that the noise is bouncing off the hood...hmmm there could be something to this...

 

so it it like a hiss sound? or better a twannnnn or tweeeennn sound? can't write out a sound.. hehe. But I know with my intake it hisses at a certain throttle opening, and then if I step on it a bit more I hear a different sound, or different pitch. Could it be the secondary butterflies opening? hmmm, it only makes that second tweeen sound when I step on it after the hissing sound starts. I know the hissing sound is from the throttle body opening and leaving a small gap and stuff... but my noise was a faint clunking one and the noise you're talking about I think I might know what it is... but then I'm not sure either. I hate weird ambiguous noise

 

Neither a hiss or a tween/twaannnn sound.
I tried to get a recording of it as I hate having to try to spell sounds out. The best description so far as been the low-flying jet noise. It isn't throttle open/close hiss - it doesn't matter what position I have the throttle at (I went out and held it at ~1500RPM with no change in intensity of the phantom noise) - actually this make me feel better as it likely isn't an internal engine component if it isn't harmonizing(there I go again trying to speak fancy) with the engine RPMs.

Another thing that I have noticed is that I can hear it in the cabin, door closed with the hood UP. This is truly leaning towards the bizarre - I seriously doubt i can just take it to my FNND and find satisfaction without tracking it down a little better...

 

I was curious so I went out to my car, and took a listen. With the air system off, you can hear a very faint whirl/clunk sound under the engine noise. It is hard to hear and if you increase the RPMs the engine will drown it out. To me it sounds like air or fluid going thourgh the AC system, even though the system is off. Anyway, the sound seems normal to me.

What was it about the sound that was bugging you?

 

I'm still bone stock in the engine and i hear it too. can't seem to find where it's coming from, but it is a clunking sound.

it may be normal and faint, but it's also irritating as h*ll when u hear it.

 

I went out after work to to listen. If it's the slght humming/faint clunk that I hear. Then I think it's probably normal from the reverberation of engine ticking, whirling, vibrations that we hear that's being transmitted through the firewall even though I think our cars are pretty well sound deadened. Although there are better cars out there. But then, it's not too bad.

 

I too experimented last night...
I think I have come to the same conclusion...its normal. Since I do have that filter on, I am going to see if putting the stock air box back on alleiviates the problem (or even changing it slightly) If not I will just take comfort in the fact that it seems to be happening to everyone...