I was told that me posting in this section would provide the most help so here it goes. I own a 2001 Lincoln Ls v8 edition and when i first bought it, it was getting around 17-18 mpg. It is now getting around 10.8. What could be the problem? The coil on my number 7 cylinder was bad and i changed that. it runs must smoother but is still getting bad gas mileage. and there is no CEL.