Can injector mouth cause black smoke,
Pls advise me because the mechanic is telling me to change it.

Okay

Please my people in the house advise me because my mechanics said I should buy another one.
I bought a car last year October 2019 everything in the car is working well. when my electrician saw the car he said the engine is very sound but is like the car will be consuming fuel and I asked how did he know he said my car is not smoking out but there is black smoke inside the exaust when he deep his hand inside. So help me to service the injector mouth twice that month I bought the car and two mouth later. So I started using the car to me the car is consuming fuel because if am driving am feeling hot nes in my eyes so I was told is fuel but black smoke is not coming out.I took it to the mechanic and the mechanic check my exhaust with his hand and saw black smoke and ask me to change the injector blog which I did but to my surprise smoke starting coming out and the fuel consumption increase after much quarrel his second in the job ask me to buy another injector mouth and put my formal nose(injector plug) the consumption will reduce and the black smoke will stop.
Please advise me

Pls can somebody teach me how to post message

Thanks for this story because even me I was surprised about the fallacy.

Pls see the doctor for a medical check up very important. Pls don't use tramadol.