5.0L (1979-1995) Mustang Technical 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.

Emissions?!

Old 05-21-2012, 04:59 PM
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Nav50
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Default Emissions?!

When I took my 5.0 to the inspection station for emissions inspection, it failed the low rpm/idle but passed the high rpm test for emissions. What could cause the car to fail low rpm/idle and pass the high rpm? The tech at the station said I was running too rich, how can I solve this problem without it being too costly?
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