I have a 93 formula and when it warms up it wants to stumble and die sometimes when you stomp it, it does die and when you try to start it back up it takes a good 5-8 seconds to start back up almost like it is flooded and then dumps black smoke. the check engine light has only come on once before and i have un hooked the battery since then so there are no codes to read (have a mac tools scanner)