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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 have changed the fuel filter, new gas with seafoam treatment clean the trottle body, gas is getting to the injector so the fuel pump seem to be working,but the car will stay started any other suggestions.
Check for codes, as mentioned, but in the mean time look for after obvisous vacuum leaks, lose hoses etc. Probably not an issue but check the MAF senor as well, needs to be clean.