Unusually loud backfires, pops, and gurgles
Hello N55ers. Not a frequent occurrence but has occurred more than once for me to notice.
Been getting unusually loud crackles and burbles from my car. Currently running catless and JB4 (map 1).
My questions are:
Is anyone with same/similar mods experiencing this?
Does this have to do with JB4 perhaps giving wrong signals (too much fuel?)?
Any ideas or comments?
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2016 F23 AW M235xi
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