[bimmerbarlos]

Can anyone shed some light on my issue I have a 2007 335i 19T turbos, catch can, new coils and park plugs under 300 miles. I have a constant missfire in cylinder 3. I’ve replaced the o2 sensors, injectors were bad and replaced them with index 12s. No leaks or anything. But the missfire is consistently there even after code clear. Will not go away

[swellengear]

Have you tried swapping coil and plug with another cylinder?

[bimmerbarlos]

Yes I have along with the injector still cylinder 3. Missfire did not move

[swellengear]

Might be worthwhile to do a compression test to verify the mechanical health of the cylinders. When last were the intake valves cleaned?