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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.
what if the problem is having no smog or egr stuff on the car, cause thats the problem i have
The only EGR codes that will cause the CEL to illuminate are 31 or 35, not having any of the smog solenoids (codes 8x) connected will not cause the CEL to turn on. The reason for the "EGR Simulators" is to force an EGR code 33 only, and not have the CEL turn on.