Intake Identification/Question

[naustin]

So I was checking my oil 'n stuff and looking at my (stock) intake and was curious as to this other hose coming off of the air box. First off I wondered what the circular thing it goes to was, and then i wondered what people with cold air intakes did to accommodate this hose.

Here is a picture. The hose in question is the smaller one below the main intake.

http://img.photobucket.com/albums/v23/austincrew05/DSC_0643.jpg?t=1207359859

[Marv17]

do you have a M44? cuz i have the same thing. i dont know exactly what it does, but it does suck in air at times. think it has to do something with the exhaust?? i dunno. but what i did when i put on a cold air intake is that i put a lil K&N filter that fitted perfectly for it. ill take a picture of it maybe tomorrow or sunday.

[naustin]

do you have a M44? cuz i have the same thing. i dont know exactly what it does, but it does suck in air at times. think it has to do something with the exhaust?? i dunno. but what i did when i put on a cold air intake is that i put a lil K&N filter that fitted perfectly for it. ill take a picture of it maybe tomorrow or sunday.

Yeah I'm M44 too. My initial thought was a vacuum pump of some sort.. but i dont know why there would be a vacuum pump on a car. It's the pilot in me talking :tongue:. Pictures would be rad, i was thinking about doing that exact thing, sticking a little filter on it. Anyone else chime in if you know what this is please!

Does Marv17 stand for Marvin? Cause thats my middle name.

[marko]

secondary air pump (vacum control - emsissions) - it runs for about a minute after you start the car (only when your eninge is cold)... dont mess with it as if it fails 1) it'll throw a CEL & you wont pass inspection 2) it costs $400 to replace. :smile:

http://s254.photobucket.com/albums/hh98/damiennn666/th_60.png

http://www.realoem.com/bmw/showparts.do?model=CG73&mospid=47506&btnr=11_1659&hg=11&fg=50

P.s. - you dont need to stick a filter on it unless you are eliminating the air box - but if you do eliminate the airbox the filter will work fine.

laslty, (IMO) 'cold air intakes are BS & they do not work as they suck in the hot air from the engine compartment (or if they go all the way down they may get wet when it rains - hydrolock - and then you are screwed). if you want some more airflow - FOGG the air box (search threads inder 'fogging the airbox').
good luck...

[Marv17]

yeah my name is marvin. your middle names is marvin too? cool. dont really meet to many ppl with the name. i always get called marvin the martain or starvin' marvin...
btw i sent you a pm

[Philly]

when you add an intake, there is a breather to attach to it... basically a small filter.

[tiFreak]

I've always wondered what those little filters were for