5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
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It only sends air into the pipes for a few minutes at start up just enough to help heat up the cats, then it diverts the air to the atmosphere. By the time the 02 sensors are on line the smog system cycle is complete and all air is being diverted out. . Not to mention that the air is sent directly to the cats via a smog tube the 02 sensors never see that air. _
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