Fiesta running rough and cutting out

When did you last change the spark plugs ? Assuming its petroleum powered .as common for faulting on that model year ,also grease the plug to lead connections lightly.you may find they are rusty ,and other basic is thrtottle clean ,Other than that you would have to check for codes to guide you ,

check the ICV thats Idle Control Valve as this may be sticking.

The engine management light has know come on... The car is going back to the garage that allegedly repaired it last week. All leads and plugs have been changed. Oil fine and coolant fine. Only got the car back Friday so has lasted all of two days before doing the same again... Coil pack been changed as well... Any thoughts would be greatly appreciated... The car is petrol