2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

where is this going?????????

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Old May 29, 2003 | 01:46 AM
  #1  
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where is this going?????????

where is this going?
thx

Last edited by owenxguo; May 29, 2003 at 01:50 AM.
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Old May 29, 2003 | 03:36 AM
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where is this going???

It's the air inlet for the Air Control Valve, here is the breakdown on what the ACV does.

AIR CONTROL VALVE - this is on the lower intake manifold, and the air pump feeds air into it. The ACV controls where the air pump's air goes - into the main cat, into the exhaust manifold, or into the silencer that's under the passenger side headlight. The '89-91 NA's have their 6-ports and VDI actuated from air pump pressure, so the ACV is required unless you fab something up. To remove the ACV, pull it off, remove the studs, put in a fresh gasket and a block-off plate. Make sure to cap off the vacuum lines that went to the ACV as well, and secure the wires up that went to it.
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Old May 29, 2003 | 07:00 AM
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Actually it's the outlet for the ACV, i.e. where the relief hose connects.
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Old May 29, 2003 | 07:03 AM
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Re: where is this going???

Originally posted by drussell1969
It's the air inlet for the Air Control Valve, here is the breakdown on what the ACV does.

AIR CONTROL VALVE - this is on the lower intake manifold, and the air pump feeds air into it. The ACV controls where the air pump's air goes - into the main cat, into the exhaust manifold, or into the silencer that's under the passenger side headlight. The '89-91 NA's have their 6-ports and VDI actuated from air pump pressure, so the ACV is required unless you fab something up. To remove the ACV, pull it off, remove the studs, put in a fresh gasket and a block-off plate. Make sure to cap off the vacuum lines that went to the ACV as well, and secure the wires up that went to it.
Hmm.. thats really good.
Hmm.. only one post?
I think we have a ringer on the forum.

Welcome..

It is the air outlet & you don't really need to connect it to anything.
Unless you have a very quiet exhaust, you can't even hear it.

Last edited by SureShot; May 29, 2003 at 07:13 AM.
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Old May 29, 2003 | 07:09 AM
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That is the outlet for the ACV which goes to the air muffler thing below the front passenger headlight. Looks like you don't have it anymore, or at least don't have the hose connecting them.
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Old May 29, 2003 | 09:16 AM
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yeah, once you have a mild tone exhaust you can remove the air silencer.. you wont be able to even hear it if you have an 'exhaust system'

OR just buy the block off plate from www.mazdatrix.com and bolt it up.

Unless it's an 89+, than your stuck with the stupid ACV


-Markus
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Old May 29, 2003 | 01:12 PM
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From: San Mateo
Any pics for me? cause dont really know about FC
yes I have a RB complete exhaust system
I am asking because I tried to pass smog check but too hard(He told me a No. should be 120 bu mine is 2000+)
so i have to install the air pump then dont know where is this connect
understand?(My English holy crap,sorry)
thx guys
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Old May 29, 2003 | 01:56 PM
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Your English is good.
The outlet is just a dump for excess air that is not needed.
The split air pipe to the cat is the primary emmission control.
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Old May 29, 2003 | 02:16 PM
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Oop's
Sorry Owenxguo, Sureshot & Nz Convertible are correct it is the ACV Outlet, it was late last night when I posted my reply, you can buy block off plates from Mazdatrix.com for both the ACV and the EGR.
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