Im working on a 91 190e 2.6. It is running extremely rich, Someone had replaced the fuel pump then it sit for about two years. When I got it the gas was old, so I dumped the tank, It had a weak spark so I have replaced the plugs, wires, cap, rotor, and checked the coil. It runs much better but still rich.. sputters as if it has a miss, if I give it full throttle it will smooth out untill the fuel catches up then begin to sputter again. Smokes bad during running and smells strongly of fuel. any suggestions?

Thanks, Ryan