Exhaust blowing black smoke
 

My car was stolen and recovered by the cops after a month .
Lots of body damage to be fixed.
The main issue is the exhaust blowing black smoke - I have been told it is over fuelling and not engine or turbo damage as no blue smoke.
But how can it over fuel , as I have a Link ECU , so the fuel is defined in the map?

The scrotes that stole it haven't put diesel in it have they?

Does't diesel chuck out white smoke in a petrol car?

Does the ECU have a OBDII socket for checking error codes? Could some sensor that's damaged knocking the fueling out.

not sure on the colour of the smoke, never put diesel in a petrol car TBH 😁

Black smoke can also be sign of a boost leak, so check the pipework.