Black smoke high? Toyota Avensis -05, t250, 1.8 petrol

[riidi]

When the engine is idling and (RPM) are increased to between 3000 and 4000 for 0.5 to 1 second, black smoke is emitted from the exhaust pipe. If you insert your finger into the exhaust pipe, it will be coated with a pitch-black substance that is completely odorless. What should I do?

When the car is idling, the exhaust gas is colorless. However, when the RPM is increased, black smoke is emitted from the exhaust, which is approximately 20-60% black. The car maintains a good RPM and runs well. Occasionally, the ignition key must be turned for more than 1.5 seconds to start the car.

Sometimes, when starting the car, there is a smell of gasoline inside, but this happens very rarely.

 

[TonyHSD]

Here information might be helpful to you. 
https://www.bodyteq.co.uk/car-running-rich-what-could-be-the-problem/#:~:text=The ideal ratio for this,considered to be running rich.