78K. Just changed 3 injectors, fuel mixture too rich after using an unecessary additive, ruined the injectors. Problem now is dark smoke on aggressive acceleration, only last until engine is warmed up somewhat. I need to know where should I be looking as to a cause. Car was never abused, and it seems too early for serious engine work. I'm probably wrong about that, but I sure would appreciate any help you all could give me. I've gone to the dealer so much they know my checking account number by heart. Thanks in advance.