I have a Passat with the BWA engine, we have had it over four years and it has been excellent I really like it.
Two things happened last week that made me wonder if there is a problem about to appear. After a run of about forty minutes it was parked up for about an hour, when I came out to start it, it was turning over but not firing, I tried again and it started fine.
Next day after it was stood overnight it started fine but was mis-firing, felt like it was running on three cylinders, it cleared after about 15 seconds and has been fine since.
Straight away I thought a coil pack was on it's way out. A Carista scan showed nothing. Do coil packs fail intermittently or do they just fail. Any ideas. The car is in fine health and servicing is fully up to date.