Fixing an ACV
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Joined: Oct 2006
Posts: 27
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From: California
Fixing an ACV
Hey Everyone,
Ok so my car has been in and out of the shop for a month now. It has been trying to pass emissions and just barely failing. Back fires when you step off the gas and down shift. From what I have read on the forum is that its an acv. I was wondering if anyone has ever repaired the rubbery gasket in the air control valve? I know they have stop making for my 85 12a. Just purchased a busted one and hoping to try to patch it up. Pictures are to come....
Ok so my car has been in and out of the shop for a month now. It has been trying to pass emissions and just barely failing. Back fires when you step off the gas and down shift. From what I have read on the forum is that its an acv. I was wondering if anyone has ever repaired the rubbery gasket in the air control valve? I know they have stop making for my 85 12a. Just purchased a busted one and hoping to try to patch it up. Pictures are to come....
Joined: Jun 2008
Posts: 8,376
Likes: 28
From: Chino Hills, CA
Success in repairing an ACV depends on what is wrong with it.
If it's just a torn diaphragm, you can possibly patch/seal it well enough to get some more life out of it; I brought one back to life from a main diaphragm tear that way, and it held up for more than a year.
If it's mechanical wear of the bypass valve plate bushing, which is another common wear point, it would take machinist's skills and lathe/milling tools to fix it.
If it's just a torn diaphragm, you can possibly patch/seal it well enough to get some more life out of it; I brought one back to life from a main diaphragm tear that way, and it held up for more than a year.
If it's mechanical wear of the bypass valve plate bushing, which is another common wear point, it would take machinist's skills and lathe/milling tools to fix it.
Joined: Mar 2001
Posts: 31,833
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From: https://www2.mazda.com/en/100th/
Success in repairing an ACV depends on what is wrong with it.
If it's just a torn diaphragm, you can possibly patch/seal it well enough to get some more life out of it; I brought one back to life from a main diaphragm tear that way, and it held up for more than a year.
If it's mechanical wear of the bypass valve plate bushing, which is another common wear point, it would take machinist's skills and lathe/milling tools to fix it.
If it's just a torn diaphragm, you can possibly patch/seal it well enough to get some more life out of it; I brought one back to life from a main diaphragm tear that way, and it held up for more than a year.
If it's mechanical wear of the bypass valve plate bushing, which is another common wear point, it would take machinist's skills and lathe/milling tools to fix it.
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