drove it to work today, finally! didnt seem to notice the metallic noise, but didnt have alot of time to sit and listen with the hood open, which is when i noticed it before. i will check again tonight when i head home.

 

Keep us posted.
Mine is loud. Windoes up or down, I still hear it. Seems to come from the drivers side, and have checked if anything is rubbing. So clapms, etc are rubbing. Seems to tick at around 2200 RMP and above. Moving or non.

 

im not sure if you and I are hearing the same sound. the one im hearing sounds like its coming from the passenger side of the engine bay, either under the valve cover, from the intake manifold, or from the timing belt area.

it does sound like the metallic sound has stopped, and the EGR solenoid was located on the firewall near the passenger side, so i am wondering if it was making a weird noise when it was actuating.

i do think i know of the sound you are hearing though. i have a different weird metallic rattle while the engine is running (moving and not), but dont think its coming from the engine... maybe it is though?? sounded at first like it was coming from my dash but i havent been able to locate it.

the 2 sounds are completely different to me though.
the one i was worried about (which sounds like its gone) sounds like its rubbing/bouncing extremely fast, like a whirling sound almost, oscillating at 500hz or more.
the 2nd sound it just annoying. sounds like a loose metal clip bouncing on another piece of metal like 5 times a second. tink, tink, tink, tink... was less worried about this one since it didnt sound critical to the engine, and i only heard it while in the car, whereas i could hear the other one while the hood was up in the garage.

ill see if i can get the annoying one on video.

 

I feel your pain.

Here´s my idle:

http://www.youtube.com/watch?v=hxvtNfL3ccU

Evo VII with fully built bottom end with Carrillo rods and Buschur JE pistons, Kelford 272 cams, Kiggly HLA, PTE 1200 injectors, Perrin intake, EGR deleted, etc.

No boost leaks. Already checked injectors on cleaning machine, changed throttle body for a IX one with a newer ISCV, checked plugs, installed a COP system and nothing made a single change on idle.

Things I haven´t done yet:
-Clean/change MAF;
-Check brake booster;

Yesterday I got me thinking if bad lifters would cause that.

 

my engine bay rattle/whirling sound is gone. not hearing it anymore.

inside the cab, i do still have a small rattle, but it only happens when hitting bumps, i think the reason i was hearing it while sitting still in the last few weeks was becuase of my extremely rough idle. it would shake the car, which would make the thing rattle in my cab.

tried to ID it this morning... pretty sure its coming from the driver's side backseat door. probably just a loose clip or something.

 

I'm having similar problem for like a year and mine is evo ix, mostly stock, before hi-cam and after hi-cam, before tuned and after tuned, it still remained.

AC ON
-When come to a stop, put gear to neutral or just press clutch, and the idle will drop till 200 then goes back up to 1.2 and 1k (default idling). Sometimes it will drop till 200, then go to 1k, and slowly increase to 1.5k.
-During stop, gear neutral, hand brake engaged, the idle will fluctuating around 200k-1.2k, and goes back normal after few second.

AC OFF
-none of it will happen

Have checked:
IAC- Check on the valve, working good, clean it. But didn't fix the problem.
No vac leak, no loose IC piping/hoses.

 

My VIII makes the same noise I think lol It happens at the same instances but it sounds like it's on the driverside on the firewall or in the dash or somewhere around there, no clue what it is.

 

my rattle is still around, and its driving me crazy. now that my car is idleing ok it only rattles while driving, where before it rattled even when sitting still

mine seems to be coming from my driver side back seat door... but who knows

 

glad you figured it out