P030X errors misfires after plugs and coils replaced

[andrewwynn]

Clear codes, set up hidden menu find the submenu with voltage and monitor real-time. When you start getting random error on multiple modules the first thing to check is stable voltage.

Do you have a BMW capable scanner so you can check the body modules. Usually if voltage fluctuation you'll get a handful of modules pissed off and will throw a low voltage code.

Also: if you do get a code on a particular cylinder swap coils with a different that's not a direct neighbor clear codes and try again. I think you said you got new coils but you could have gotten a defective one. New often ≠ fixed.