Evening.   Since going single my car has had a misfire and was only able to be mapped at max 1.2bar. Pulled well till I got back up the road and changed the coil packs. I took the failing OEM coils out and put new whifbitz coils in with no joy if anything it was worse. Today I got a set of used OEM coils to try and it was perfect for about 40mins. It's back to misfiring again? I have a new set of OEM coils being delivered next Friday but I'm not sure why it worked temporary with no misfire a