Is a new maf needed?

[Ben hdi306]

Hdi 306 stage 2 pro Steve remap

So I've been have some issues latley with the car when I put my foot down I get alot of black smoke but if I slowly build up the power it dont seem to smoke so bad, I've recently done a service -all filters- oil-

Now I've been reading a few posts and seen people say unplug the maf so I tryed it and there was no smoke but it felt like I was running standard power again witch felt like the speed of a bus lol.

So has any one else had an issue like this ?
Any tips or ideas I can try? Cheers Ben