I bought a 96 caddy seville sls as an investment. Its a GREAT car, but most of the time when I start it after it has been setting for awhile I have to turn the ignition on and let it turn over for quite awhile before it will start. Once it starts I can turn it off and then start it up again and it fires right up. I dont know shiit about cars. Anyone have any ideas as to what it could be?