But what's a BAC? I can't search any of the online manuals since I'm on an iPod and it takes FOREVER to download anything. I'm reading up on making your own CAI in the archives and it's one of the acronyms I have no clue about lol. If it specific to turbo only, then I won't worry about it.

 

Bypass Air Control Valve. It's the valve the ECU uses to bypass air around the throttle body to control the idle.

 

Bypass Air Control Valve. It's the valve the ECU uses to bypass air around the throttle body to control the idle

i think thats what it means

 

cool found the answer i was looking for the search feature works!

 

Is it one ofthe two hoses connected to the stock intake pipe between the MAF and TB?