Hi, im a new user, im From Argentina, ive boght a 155 Q4 a few days ago. This is my first Q4, my father had one and sold it 10 years ago.

Ther car havent worked in two years because the last owner decided not to use it because it was not working fine (black smoke, and doesnt iddle) so the car was without use for 2 years.
Now, ive put a new battery and started it, with a lot of difficult. The car doenst iddle , and it smokes black when I accelerate. It also rattles as if it has a timing problem at all range.
To start the car is a little bit difficult because i cant accelerate it, i have to try several times , and after 10 minutes it starts but if you press de accelerator and the car is cold, it turns off. Also I cant press the accelerator when im starting it because if i do it it doesnt start.
The rest of the car works great, aircon, lights, suspension, etc etc.
Any ideas where to start? .


PD: Sorry for my bad english.