Engine misfiring and running very rough. Almost jumping is what it feels like inside

Hello, black smoke typically means the engine is going through and excessive amount of fuel that is not needed. This can happen due to the engine's computer either thinking there is a significant amount of air getting into the engine -- or it can actually be that there is indeed a significant amount of air! Hands on diagnostic testing using proper diagnostic tools that can retrieve diagnostic trouble codes (DTC's) will give clues as to where to start the diagnostic process and where to look for the root of your concern or concerns. For guidance, definitely reach out to a shop near you for guidance. Technicians will be able to drill down to what is causing the problem and give you advice on how to fix it. https://repairpal.com/auto-repair-near-me