I need some ideas to fix my 1992 ls 400. I'm not getting any spark. Replaced the ignition coil and still nothing. Seems like no power to the coil. Checked every fuse. Any ideas would be appreciated.

 

Is the check engine light on? Would start by reading the engine codes.

 

Go to the fuse box under the hood. High temperature can cause the fuse contacts to corrode and develop a high resistance or even total loss of contact between the fuse and the the fuse socket.
I suggest you physically remove each fuse and clean the two fuse contacts.
Use WD40 and gently scrape the contacts with a knife blade or metal finger nail file until they are nice and shiney.
Or simply replace each fuse with a spare. Same amp rating of course!
Good luck!