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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.
I just noticed that my fuel pressure regulator vacumm line has not been hooked up for months. Car runs really good all the time. Shouldn't I have noticed by the drivability?
probly not, but you would probly use alot more fuel than needed. If you hook it up and notice drivability issues, then its likely that your pump is weak.