Are we interested in knowing what the wire is for or where it goes?
The wire is a ground wire. The purpose is to ground the fuel rail to prevent the build up of static electricity from the flow of fuel inside the fuel rails. By grounding the metal of the fuel rails this keeps the electrical potential at the same level as ground, there's no electrical potential difference that might cause a spark. The separate ground wire is needed because the intake is made of plastic. This makes the metal of the fuel rail electrically isolated from the engine block.
Where the wire goes is to one of the double sided studs that hold the fuel rail down.
2003 GT Convertible (sold & missed)
2000 GT coupe (Craigslist project. Fixed. Now my DD). Windsor to Romeo swap.
Last edited by wmburns; 10-03-2019 at 11:36 PM.