I just came upon a 1986 graduate that has been sitting for a few years. Only has 37k miles on it. Previous owner drained the fuel tank and put a few gallons of fresh fuel in it. He tried to start it but noticed fuel leaking under the car while cranking it. Couple months later and now it is my car and my problem. I put a new battery in it and it tried to start it and black smoke came out the exhaust as it stumbled then stalled, tried a few more times and no start or stumble just cranked. I looked under the car and fuel is dripping from the catalytic converter. Obviously some fuel source is leaking into the engine. I guess one or more injectors could be stuck open. Any way to narrow it down and could something else be a source of the fuel like the cold start injector?