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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.
Hey fellas, Do these red Holly adjustable fuel regulators require the vacume line after setting the pressure?.I hooked Vacume line up to it and i can see it affects the pressure when I hit the throttle(pressure up). If I leave the vacume line OFF the pressure stays the same when hitting the throttle.