I have Car Problem does any one have any idea wat it is?

When i drive my car and take a sharp left hand turn it feels like my car dies, but its still on....i press the gas and it shakes or jumps and feels like no gas is flowin,then it stops and runs normal or i have to pull over shut my car of and start car again so it work properly its been doing this for a while. I woke up this mourning and i started my car and dark smoke came outta my exhaust and my Car was buckin crazy.... i turn car off, then turn it back on, same results buckin and smokin....so i let it run like that for a min wit it buckin and car dies....now car wont even turn on......ANY IDEA wat it is????