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2010 535i - I did a WOT test, DWP on the JB4 is set to 100. The start of the test is In 3rd gear at 60mph. When I floored it the boost dropped to 5 Hg then shot up to 20Hg and then settled st 15 Hg. Do I have a bad boost solenoid? Video is here:
https://youtu.be/pHCF6Tyr89g
https://youtu.be/pHCF6Tyr89g