K&N panel filter but only as of yesterday... thought it may help and it considering an induction kit. As far as I know the air flow and exhaust is okay. I have a custom exhaust on it with a wider pipe, cat back. CAT is 100% shot so considering decat. (It is an N13).
I agree re the coil & spark...
Thanks for the suggestion, my understanding is the plugs foul and require more power to spark so they draw more current through the coils and cause carbon traces within the COP which then creates a path of less resistance so it arcs making the problem worse and worse. Only happens under load at...
Looking for some help with my 116i F21.
I have had the car remapped now for maybe 3 years and have had multiple issues with misfiring. First time it happened, coil pack seemed to resolve the issue. The next, ECU repair. The next I send the ecu back for repair again, no issue so coil pack +...