Okay, it's a 2003 US Market Grand Vitara 4X4 with the V6.  On the rubber tube thing between the air box and the intake manifold there's this box thingy hanging off the rear side of the tube.  No wires or hoses leading to it.  Just this dohickey box thingy hanging there.  WTF is it?

It's likely coming off I just want to know WTF it is.

The service manual doesn't mention it... There is a diagram that shows he whole intake system, with all the parts labeled, the part is there but it isn't labeled . Maybe the parts list will tell us what it is, but I don't have it...

I asked this some time ago and the best answer was "resonator".  Keeps the wooshing sound down to a minimum.

jSager

Of all the goofy ideas.  Yep, it's going bye bye.

Thanks guys.

Its a sound resonator

Hey let us know if your immediate accelleration when you put your foot down suffers....actually more to the point....see if as soon as you stab the throttle does it hesitate...

Only reason i mention this is that I thought it was a clean air resoviour (sp) I used to have one on another car I owned and basically when you hit the gas peddle the engine can imediately suck air from this storage area rather than trying to draw it through a potentially dirty filter.... I may be wrong but don't remove it with no way to replace it.

Cam

My current thinking is something similar to what I did on a Chevy pickup I had.  Some rubber pipe connectors from Home Depot and maybe 4" of pipe to make the connections.  The stock tube would stay safe and sound in the garage unless I needed it.

Its a resonator alright.....It's used to either tune the intake charge, or to mellow out the intake noise.

As the valves on the engine open and close the incoming air will "slam" against the closed intake valve, and then when the valve opens, the air gets sucked back in. This repeated stop and go action creates a frequency within the intake tract. By adding the resonator they can "tune" the frequency for a more efficient burn at certain rpms. I used to have the website with all of the technical garb but have since lost it....I only know this because there was a big deal about it on another forum I'm part of.

hope that helps..... and removing it won't make a noticable decreace or increase in performance.

Removing it will make shit hp. Its just for resonance. The IAC on EFI cars are loud so this helps at idle but at WOT this res canceled out sound waves