OK, Need some more information.
Is there key on power in and out of fuse F2.2 and F2.8?
If the remote start is used to you hear the fuel pump run?
However, it wouldn't surprise me IF the remote start is wired into the fuel system as well as the ignition. It also wouldn't surprise me if there were some hidden switches that also need to be "activated" to use the key.
2003 GT Convertible (sold & missed)
2000 GT coupe (Craigslist project. Fixed. Now my DD). Windsor to Romeo swap.