Hope u all can help. My car runs great, but all of a sudden it'll die on me in a light. I'll try to turn it on and when it's about to idle again, it'll sound like if it's about to choke, die again. I'll keep pumping the gas peddle and all of a sudden it'll let out a bunch of smoke from the exhaust, and it will then run fine? What can this be? Fuel filter? Injectors dirty? Any comments will help, thanx!

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92 Firebird 305 TBI
K&N Open Air Element
K&N Crank Case Filter
Just a begginer, soon i will advance!