1993 dakota 3.9l magnum, poor gas mileage
I got a 1993 dakota with the 3.9, 200,000 miles on it. When i first got it a few years ago, i was getting 16-20 mpg pretty consistantly. Then all of a sudden it dropped to 9-11 mpg. Never lost any power, still runs great but the exhaust smells funny, like its rich and its a very strong smell. No check engine lights ever come on. No smoke. No cat converter. Recently replaced plugs, wires, cap and rotor. Replaced air filter also. What should I do next?