My 1996 buick road master collectors edition has 111,000 miles, It floods and burns the fuel very rich
it has been burning the fuel very rich. it floods but don't quit running. My husband cleaned the mass flow sensor and had another sensor changed. also had one of the catalytic converter taken out. It still blows black smut onto the ground from that exhaust. also changed the plugs. is there something we are missing here? I've read about the distributor but what about the coil packs? Any info about this car will help tremendously.