Puzzled?

[Justin Kyle Phillips]

Hi everyone, thanks for having me! I have an issue with my 2003 tahoe..I recently had the engine replace with a used engine, and now after about the first 10 to 15 miles (after cranking) the engine gets a miss to it and blows black smoke from exhaust pipe with a raw gas smell. I've replaced plug, wires, fuel filter, and fuel pump. Just wondering if any one else has had this problem before and how they fixed it?

 

[dunpomax]

It could be an issue with your an erroneous injector timing or an injection control problem.