Hi. I'v got a escort cozzie, big turbo that's running on green injectors, 3 bar map sencor. I had a problem with the car backfiring, I'v sorrted that out now, but now the car is running rich. When you boot it, it chucks out black smoke. I don't know what the lamber sencor is like, if it's working or not. Befor i had the problem with the car, she was running fine. What should I check or adjust, if anything? Thanks. Tony