someotherguy
+1y
A radiator shop will clean the tank out, but if you're seeing rusty looking crud in it you might be due for a new tank. Dunno where you're located but if it's been around road salt or a bunch of muddy crap, it tends to collect on top of the tank and rust it out. Or, since you're a 91 which will be EFI, when the in tank fuel pump start failing sometimes it will fill the filter up with debris that is actually shredded pump parts.
Richard