CHEVROLET S-10 BLACK SMOKE

I Have A 1994 S10 2.2 It Is Hard To Start And When It Starts It Puffs Alot Of Black Smoke Then It Will Run Fine Then When I Go To Take Off...

Here Is The Situation : The Black Smoke Came Out Of Exhaust Only When Reving The Engine Up And Down, But When Accelerate And Hold It...

It Will Stumble And Die Then Will Restart In Clear Flood Mode! It Has A Dtc 15 And Has Put A Dtc14(14 Is High Temp. And 15 Is Low Temp.)....

The Problem I Having Is That It Spits Out A Lot Of Smoke Through The Exhaust. I Changed The O2 Sensors, The Two Of Them And It Still Emits...