Pontiac Other Engine Runs Rough

I Was Driving About 20 Minutes And And Stopped For A Light. The Car Stalled. I Started It. Bklack Smoke Came Out Of Exhaust And Then It...

I Think It A Injector B/c I Read A Post On Here About A Partly Clogged Injector And I've Had That Prob. But Now It Just Runs Really Hard Its...