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Hard cold start - getting worse
I have a 2016 m235i xdrive with 90k miles. Completely stock except for a BMS Stage 1 added when I bought it at 25k.
Since 70k miles or so, I have had an intermittent cold start issue where it cranks longer and sputters. Once it starts, everything is normal.
No CEL.
I replaced plugs and coils at 75k and the battery recently. Both seemed to fix for a week then the issue returned.
Lately the issue has gotten to be almost every cold start and much more pronounced. I am concerned it may fail to start.
I have no BMW dealer within 300 miles.
Can anyone help me diagnose this issue? I have a video, but am unsure how to upload.
Thanks,
Chris
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