N53b30 misfire

[Peter Sz.]

Greetings!
I may ask few questions

3injectors(first bank)and 6 ignition coils+ spark plugs have been replaced in my car already but misfiring(not always)and cold start(little shake while warm start) shaking still presents.
Only misfire error code showing in ecu.
Do I have to change the other 3injentors? First 3 is now index11 the other 3 is index08. (Use only premium fuel, 82k miles)
F10 528i 6cylinder n53b30 2010/06
Any suggestion?

 

[doublespaces]

Do you have a datalog? If you have stumbling on startup you might have a leaky injector. You want to fix that asap because it can leak down your cylinder walls and remove the oil film on your bearings too.