Just added a JB4 to my M3 and curious how this Map 1 looks. I ran JB4 on my n54 car for 5 years or so and don't recall seeing this prevalent of ignition changes but this is a completely different platform and I don't know what normal is yet. I replaced the spark plugs with NGK 97506 gapped to .022 prior to installing the JB4. Otherwise the car is stock performance wise.
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