1988 labaron no start

[dominic]

hey i need some help im working on this 1988 labaron and its a no start it has fuel presser spark an the timing belt is on time. good coil pick up. changed both computers. good comperssion. if u spend time cranking it over it will start . then barly runns an then dies. it smokes black like too much fuel. and i was thinking it might be some stuck open injectors . if any one has any ideas please let me know