[size=6][size=3]1994 MUSTANG V6 STANDARD LX
my #6 fuel injector is staying on
when the wire that controls this injector is removed from the computer
the noid light goes out
after a rebuild it started and ran but the driver side cat turned red
is there anything besides the computer that can cause the problem?
also is there a source for a computer should all else fail?

any help appreciated

allen