How to improve fuel consumption for 1991 toyota corolla xl5?

Recently overhauled carburetor, changed jet sizes to 95 & 110, installed new distributor cap, condenser & high tension wires and still my fuel consumption is around 6-7km/liter. Also noticed strong smell of gasoline from exhaust pipe which leads me to believe that fuel isn't burning properly which causes high consumption. How do i fix this?