elton

wassup!!

I read this in the emissions removal thread:

quote:
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(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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I was under the impression that the air pump ran those ports in the '86-88 NA's also. Is this a misconception? If so, then to remove the cats and air pump is as straight-forward as unbolting everything, correct?)


no one answered this question. i have an '86 NA and was wondering if I need to fab something up or not!!!

Thanx in advance for any help!

BTW does anyone know if there is any photos on removing the emissions system out there?? it would really help...

NZConvertible

No, the S4 NA's use exhaust backpressure to operate the axillary port actuators. Yep, you'll also need to cap the redundant vac lines.