Ok guys so I have a 85 GTS and I was jumping it off but me with my dumb self put the cables on backwards and know it won't start (facepalm). At first it wouldn't crank so I replaced the two fuses next the battery and now the starter works but still won't start. Also replaced fuel pump relay but still won't start. Any ideas on what I should check next would be great feel free to get a good chuckle out of my stupidity also . I am a complete noob when it comes to electrical stuff.

If you are lucky it will only be a blown fuse, so check all the fuses in the
underhood fuse box. In particular the 15A EFI fuse.

Cheers... jondee86

It also is worth checking the IGN fuse in the left kick panel as it turns on the Engine Main Relay, EFI Main Relay circuits and drives the charge warning light circuits.

Thanks for the info guys I replaced the efi fuse and efi relay and it fired rite up.