Car is a3 2.0 tdi 170 bmn with dpf and egr removed..
As above the fuel filter was jet black when I last changed it approx one month ago and the car has cold start issue..
After the car sits for 6-8 hours it takes a couple of turns of the key to catch, runs rough for a few seconds then clears, somedays the cold start is worse than others
Once the car is started its fine for the day and has no issues whilst driving..
The car was checked by audi before my ownership for injector issues and according to my paperwork the injectors did not need replacing
Read it could be tandem pump but at £200-£300 I want to know if it could be anything else before shelling out for a new one