Cold starting issue

[Ciaoflyer]

Not sure where to put this but hope you can help. I have a starting issue when the engine is cold. The engine fires up but runs really rough and wants to stall, also the belts slip and make a terrible noise. If you touch the accelerator it does stall and is difficult to re start. The only way to re start is to put accelerator to the floor and turn the key, it lets out a lot of dark smoke and then runs and ticks over perfectly. The engine did the same before I rebuilt the engine so this issue is still there. It is a fuel injection DJ 2.1 WBX. Thanks in advance.

[Ciaoflyer]

I have fixed this, all it was were loose belts, tightened and now starts perfectly every time.