2012 750i Misfire

[GonzaloRamirez]

Hello everyone I have a 2012 750i that I recently had new heads put on. I start the car and have 5 codes and they are. (150402 Ignition, cylinder 3 combustion time too short) (140402 misfire cylinder 4 exhaust gas damaging after startup) (142002 Misfire tank fill level too low) (140801 combustion misfire, cylinder 8 injection will be switched off) (140601 misfire cylinder 6 injection shutdown) Car will start but idles like crap. Any help/advice will be greatly appreciated!

[GonzaloRamirez]

No answer so far, have swapped coils and injectors around and misfire does not jump.

[RocketSurgeon]

Why were new heads required? Was there cylinder or head damage? Did you use new or used heads? What index are your injectors? You may need to do a compression or leakdown test.