Black smoke is excess fuel in the engine/exhaust being burned. Here is a guide that will help with this info:
https://www.2carpros.com/articles/engine-black-smoke
Did this issue start immediately after this repair, or has it been some time since you replaced the EGR?
If this happened immediately then we need to question if the EGR is faulty. It is possible to get a faulty new part so we can't eliminate that yet.
However, the other things that will cause something like this are vacuum leaks and fuel issues.
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
Also, we need to check the fuel pressure and then let the gauge sit and shut the key off and see how long the pressure remains.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Let's run through this info first and hopefully that will give us a better idea on where to go next if we don't find it.
Thanks
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Thursday, October 21st, 2021 AT 7:03 PM