Checking a MAF at idle is, IMO, of little value. It varies too much based on engine temperature and parasitic loads. If you're trying to diagnose a possible bad MAF, log it trough a full-throttle run in 2nd or 3rd gear.
So I did the log with the second gear and third gear pull the map seems to be responding fairly linearly I am having random nights too serious misfires under load around 3000 RPM and sometimes at and sitting for a minute or so the car will stumble quite a bit on initial load acceleration from stop not bad enough to set the check engine light but it does flash and it’s on cylinders one and four I have replace the coils any thoughts would be appreciated , Fuel pressure and duty cycle seems to be good .Long-term fuel trim is up around 13 1/2 so it’s Rich for some reason
It has a eurodyne stage one tune So 18 or so pounds of boost . I cleaned up the maf gently as best as I could with compressed air and now my long term fuel trim is down to around nine , I am living in the UAE and I ship the car over here I don’t know if the heat might have anything to do with it but it was fine until about a month ago when it started acting up I’ve been chasing it for a while not really convenient to get to a car dealer here I do have vag com , I wish it would throw a hard code but it’s not