My '89 SC is running fine as far as I can tell, but the Cats are getting really hot on long drives. Extra fuel must be spilling into them causing the heat ( I'm guessing ) And if thats the case...why ? And wouldn't I be experiencing other problems like lack of power or fuel odors ? No check engine light, but it does idle just a bit high so i'm guessing it's running rich. What could be causing this ? Any help would be great, Thanks in advance. Mark