99 k2500 454 vortec suburban starts missing and blowing out black smoke while driving

My 99 454 vortec 4x4 k2500 suburban just started missing and blowing black smoke out the tail pipe at the same time if you floor it it quits and runs out good we have changed the wires plugs and button and still is doing the same thing. . . . .please help . . . .

blk smoke = running rich. any codes? did you check air filter. you could have injector problem. but if you have codes more can be done

Thanks for the info cause you was correct by the time you posted my ol man had it pin pointed to which one it was. Thank you so much

Oh and i forgot to state that it has a after market cold air intake on it thanks for being generous and helping up out thanks again

Thanks for posting back glad to have helped but looks like DAD had your back.