Upload a vid to Ytube and post the link here so we can hear what you hear.
You can also data log and make sure you get WGDC%. Email PTF Support and tell them which of your logs to look at. I think (not sure) WGDC in high 90s starts to show problems.
Yes, changing CPs can cause a boost leak. One guy had a pinhole under the powder coat...
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'18 F80 Base 6MT | '19 F82 Exec DCT | '18 F82 Comp Exec DCT | '23 G80cx
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