Miata Mailing List: May 1994, Message #6
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   From: tom.manson@pobox.com (Tom Manson)
Subject: Air Duct Oddity
   Date: Sun, 1 May 1994 22:37:41 -0400

Miateers,
The subject of this posting may sound a little misleading, but I am
curious about the short length (10-12 inches) of extra plastic that runs
along the air intake ducting prior to the filter box.  Mine is a '93
if that makes any difference.  This small plastic duct (probably 1/2
inch in diameter) is on the firewall side of the duct.  At the end
closest to the opening of the duct it has a larger enclosure (a
"box" probably 2" X 3") with no obvious opening to the outside (engine
compartment) air. The 1/2 inch duct then runs along about 10-12 inches
of the duct and appears to open into the duct near its end. It is a part
of the molded plastic ductwork and doesn't appear to me to serve any
useful purpose. I am considering rerouting my fresh air ducting and
don't want to eliminate an essential element of the duct.
Can anyone tell me what this thing is?
Tom
Tom.Manson@pobox.com
Manson@fsd.com