AAV Valve

Discuss topics related to the CA18DE and CA18DET series engines.
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oversteer180
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Car: 1990 Silver 240sx

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Ok, so the aav/fidle that comes off the side of the intake...where does the rubber hose that comes off of it lead to? I know its supposed to go to a port underneath or around the intake manifold...but for some reason mine has been removed or something. This may sound weird, but If you know what im talking about let me know!


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c-rad
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Car: 1991 Nissan 240SX w/CA18DET
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oversteer180 wrote:Ok, so the aav/fidle that comes off the side of the intake...where does the rubber hose that comes off of it lead to? I know its supposed to go to a port underneath or around the intake manifold...but for some reason mine has been removed or something. This may sound weird, but If you know what im talking about let me know!
It attaches to the IC pipe before the throttle body.

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oversteer180
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Joined: Tue Mar 15, 2005 2:28 pm
Car: 1990 Silver 240sx

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I thought the little rectangular black box that is underneath the throttle body connects to the ic pipe before the throttle body?

So im guessing they both run into the same spot. Im just trying to trace back where some of this stock stuff goes.

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oversteer180
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Car: 1990 Silver 240sx

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Anybody?

bentvalves
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Joined: Sun Sep 03, 2006 8:58 am
Car: 89 Silvia K's

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you figure it out yet?

if not shoot me an email.


Not_a_sr
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Car: 90 ca18 pwrd 240sx FB
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in stock form the rubber hose should come from the intercooler pipe to a metal pipe that goes under the intake back into another rubber hose that goes to the AAC valve.

(its been forever since i had this stuff on my motor so im kinda going off my sketchy memories) there is also a hose that goes from there maybe to the air regulator that bolts to the front of the intake manifold then back into the AAC valve? its used for cold start.

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oversteer180
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Car: 1990 Silver 240sx

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ok thats what I was thinking.

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roplusbee
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Joined: Tue May 23, 2006 11:44 am
Car: 2007 350Z NISMO

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How does this help/hurt you if those hoses have been removed/disconnected? Does that mean that cold starts are rough or more volitile? Just wondering because I may be upgrading soon and just want to wiegh my options.


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