OK guys this is interesting. A friend of mine has a 95 5.0. He Is getting a code for both o2 sensors max rich limit. Replaced both sensors and same problem. Took it to 2 shops 1 shop says he is getting codes for maf sensor both o2 sensors faulty fan relay and fuel pump voltage to high. Second shop says maf sensor not communicating with ecu. I think it's all a bunch of bull but here is the problem he has o/r h pipe with flow masters that's it the car gets horrible mpgs I can clearly see it dump black smoke and it idles erratically. I Was a wondering if you guys had any ideas before he pays another mustang Butcher here in Florida. Thanks guys