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This is a discussion on Acv??? within the TECH Discussion Forum forums, part of the TECH Discussion category; Whats an ACV, what does it do and do you need it, cuz iv seen people remove it and wondered ...
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04-27-2004, 04:22 PM
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#1 |
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Registered User
Join Date: Feb 2004
Location: Elk Grove CA
Posts: 138
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Acv???
Whats an ACV, what does it do and do you need it, cuz iv seen people remove it and wondered why.
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04-28-2004, 11:41 AM
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#2 |
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Registered User
Join Date: Dec 2003
Location: North Dakota
Posts: 393
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ACV-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. Oh yeah on a S4 fc it is not needed. but if you remove it you can also take the air pump out but you'll also need a duel belt pulley for your alternator so that your water pump functions correctly.
Last edited by theflatlander; 04-28-2004 at 11:52 AM. |
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04-28-2004, 12:33 PM
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#3 |
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Registered User
Join Date: Feb 2004
Location: Elk Grove CA
Posts: 138
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what would be the benefits of taking the ACV and air pump out?
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04-28-2004, 12:50 PM
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#4 |
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Registered User
Join Date: Dec 2003
Location: North Dakota
Posts: 393
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less stuff to deal with in the engine bay.
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