What do you mean by "done"?
Injectors clogged, in tank pump shot?
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look in the tank,
you might consider replacing tank, pump, lines, filter rails, regulator and injectors
If it were me, I would just replace it all, otherwise you risk just having continual issues.
the fuel of six years ago, is usually good for 3 to 6 months
water in the system will oxidize the inside of the fuel system
Flushing the system will not remove oxidization
89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.