Hello,
Black smoke usually indicates that there is too much fuel being burnt in your engine's combustion chambers. here are a few possible causes for this rich condition, leaking fuel injectors, a bad fuel pressure regulator, shorted to power fuel pump that is being over driven, etc.. Here is a link for you to go to below explaining this condition in more detail:
https://www.2carpros.com/articles/engine-black-smoke
Please go through this guide and get back to us with what you are able to find out.
Thanks,
Alex
2CarPros
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Saturday, September 21st, 2019 AT 3:28 PM