Could possibly be the shift cable. This was a fairly common annoyance to some in the past. Do a search for "shift cable" on this site.

 

Could be the shear panel as well.....again do a search.

 

The leather shifter boot has little metal clasps that affix it to the console. Two have fallen off in my car and start buzzing at certain engine speeds (like 2250 RPM, always while slowing down). Of course, the console has to come partially out in order to collect the things.

Nickels are the worst, but anything that gets under the carpeting and onto the aluminum tub becomes annoying as hell. Pull the carpet up and make sure the interior of the cab is clear.

 

jeeez, if we all got concerned whenever we heard buzzing, we'd never drive a Lotus.... i think the buzzing comes standard. :

 

My dealer charged me extra.....

 

I had a buzzing sound that was coming from the intake duct. I wiggled it around a bit and it stopped.

 

Could be a quarter under your seat, or the wires under your driver's seat.

 

Check the heat shield around the exhaust esp. the one around the 180 degree turn on the driver side. The front rivets fell off on mine and made a huge buzzing sound only at certain RPM's.

 

Description: A noise unique to the condition of zero drive-train loading - neither accelerating or decelerating - but not effected by rpm or speed.

Logical suspects: Engine mounts that are loose and vibrate when not loaded, but get pulled tight under engine torque one way or the other. Transmission gear lash (I have this noise) that is only heard at that precise neutral throttle level that doesn't push or pull the driving gear against the driven gear. Other drive-train looseness I haven't thought of that allows relative movement only when torque isn't applied one way or the other.

 

Belt tensioner. I had something similar to what you describe that occurred in the 3K-5K rpm range and that was the culprit.

 

I also have this sort of noise. I wouldn't call it "buzzing," it's more like the sound of a loose chain or loosely meshing gear, perhaps a pully with a bad bearing. It also only happens in the 3-5k range when the transmission is not loaded - when more or less coasting or gliding without using power. I would not have thought it's the sound of a belt, since it has a vaguely crunchy or grinding tone.

you guys talking about the same thing here? I think I have this also. Sounds like loose change or squeaking.

 

I also have this sort of noise. I wouldn't call it "buzzing," it's more like the sound of a loose chain or loosely meshing gear, perhaps a pully with a bad bearing. It also only happens in the 3-5k range when the transmission is not loaded - when more or less coasting or gliding without using power. I would not have thought it's the sound of a belt, since it has a vaguely crunchy or grinding tone.

 

It sounds like a metallic buzz; it's kinda reminiscent of the sound a cicada makes.

 

it's

 

I have that exact same outfit!

 

Have owned 3 Elises (2 bought new, one bought w/6K miles) and an 06 Exige.

All had this buzzing sound the entire time I owned them (including the current Elise).

 

I heard something similar, and it happens when im coasting with the clutch down, and in gear. If I take it out of gear, and release the clutch, the buzzing is gone. try that!

 

thanks guys, all great info and i will get to the bottom of it.
XTN, that is the correct description and i will test for that specifically, only thing is the car has to be moving...it wont do it standing still. i have it does it @ every RPM level, but again only when moving.

once i find it, i will post it, cause this is really the most annoying sound i have ever heard.

cheers

 

I've got that too... It seems to be quite common so i've learned to live with it... that said, if you find the solution let me know!!

 

One of the rattles I had turned out to be a missing nut on one of the front clam attaching studs. When I had it in for a brake fluid flush, the tech noticed it was missing and put a new one on.

You might want to check nuts and bolts for tightness... or missing.

 

the lidbone vibrates also

 

Sounds like the BMR, aka bloody metallic rattle. Do a search on BMR or metallic rattle, lots of info on the forum. Here's a link to one thread.
http://www.lotustalk.com/forums/showthread.php?t=16163

I've checked everything, and I still have it, although it did get much quieter after 1000 miles or so.

 

one time, i had a really bad buzz and found out that it was a coin in the cup holder between the seats.

 

It's the throwout bearing-

Might want to get it checked, as it's bad news when they fail-

 

I have a slight buzz/vibrating sound when I'm on the highway and barely on the gas like under 1/4 throttle. At 50% throttle or more the exhaust drowns it out.

 

And the roof squeaks for a while.

Lots of threads here on that one.

 

I am fairly well certain it is internal to the transmission. Mine improved with fluid change and is worse when hot.