[Brad.Jones]

Hi Guys,

Getting towards the end of my 1.6L conversion.
And I have a vacuum hose that I am not 100% sure what to do with.

https://www.youtube.com/watch?v=0Wnh5xaGv28

The hose that the guy in this video is holding / blocking with thumb.
What does the plastic box / filter / valve do? I don't have it, do I need it?

I can see where the hose needs to go to on the air in-take, see the first pic:
http://imgur.com/a/3WD76

But I just don't have the little plastic box thingo.

Can I run it direct without the device?
Or can I just block that hose off altogether perhaps?

Thanks Brad

[Brad.Jones]

Okay so I think its the IAC Filter, according to this diagram.

http://www.fixkick.com/sensors/96-16L-plumb1w.jpg

Is it absolutely critical?

[Gwagensteve]

Yes. It's the idle air control. Car won't idle properly without it.

Isn't it just connected to the air intake crossover pipe? pretty sure mine is.

*Edit* just seen the diagram, so now you know where it needs to go.

[jdk81]

That black plastic box can be blanked out (I think it adds volume behind the afm, so it acts like a reservoir of air to somewhat reduce pressure pulses on the afm).

I clamped a small pvc end cap in place, but I have more piping than stock g16b setup.