4lo blinking, engine light on and excessive black smoke from the exhaust

Hello, I'm Danny.

It sounds like you might have be having a few different possible issues. The check engine light being on means there is a fault code or codes stored in your car's computer and we need to know what they are. here is a tutorial showing how to retrieve fault codes from your vehicle:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Here is a tutorial for black smoke or running rich:

https://www.2carpros.com/articles/engine-black-smoke

Once you perform the code-scan reading procedure get back to us with the code information and we can then help you properly diagnose the issue or issues with your vehicle. Hope this helps and thanks for using 2CarPros.