breakneckS2k

what is the little thing that's on the top right hand bracket on the factory airbox on the inside of the intake bend? It's a small circular part with a square bottom and a harness of some sort plugged into it. Mine has a label that says "ACS", but it looks like a homemade label for some reason or another. I was just curious as to what it is and what would cause it to make a small "cshh....cshh" noise.
the noise is totally random and doesn't seem to affect anything, it's just annoying. No CEL's or anything.

breakneckS2k

anyone?

negcamber

How about a pic...even from your phone. Host it on Photobucket since you aren't a member. Kinda hard to be sure exactly what you are talking about.

But I think you may mean the air control solenoid for the bypass valve to the vaccum tank. It's part of the emmissions control.

breakneckS2k

phone's messed up but I'll try and get a pic together.

if it is what you think it is, do you have any idea what would cause it to make a noise?

nightcrawler7188

yeah it's the bypass control valve