Hi. I have a 1.6 petrol 2007 beetle which has a overfuelling issue causing the car to white smoke badly. One injector is putting a lot of fuel through, changed the injector and the car ran fine for 5 minutes then fault came back, swapped and changed injectors with the same results,leaning towards this being a ecu / wiring issue? Anybody come across this themselves? Any advice would be greatly appreciated.