I have an '84 720 2.4 king cab with a rich fuel, bad timing, thing going on. Mixture is rich (smell gas) and the car spits and sputters like a bad fuel filter. It normally runs smooth without any vibration. Now it's shaking like an earth quake. I changed the fuel filter....no help. My idle has always been way high in cold weather....Car always and still starts right up. Auto choke? ???

check the choke function and check the pressure regulator functio..

make sure the float is not sticking..