I think i just replaced one on mine. the mixture control is the hole that you can access thru the air cleaner right in the middle. by using an allan (?) wrench you can adjust the fuel into the injectors. i think it is located at the fuel distrubitor on the passanger side, there is a black plastic gizmo about an inch high and 3 inches wide that is attached by 2 or maybe 4 screws located behind a plastic cover that is a little hard to see but with a knife you pry them (it?) off and remove the screws. I just put a used one on that came with a used fuel distrubitor. ( I PUT THE Fuel Distrubitor ON ONE CAR AND THE MIXTURE CONTROL (?) ON ANOTHER THAT WAS LEAKING GAS FROM IT) WARNING ...I AM NO MECHANIC AND MAYBE I DIDN'T EVEN REPLACE THE FUEL MIXTURE CONTROL? BUT I DID REPLACE SOMETHING ?? GOOD LUCK