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      02-13-2018, 03:59 PM   #8
roastbeef
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Drives: E92 M3
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Quote:
Originally Posted by EJT86 View Post
Quote:
Originally Posted by dakarwu View Post
The engine rev was while my foot was on the brake and completely stopped. It sounds like how the ICV acts on cold start but much louder. I assume since I didn't really let the cold start finish it could just be that.
thats been known to happen when theres a failing brake booster. a vacuum leak
You know what... I can't remember the timeline between the two events, but it sounds like the op would describe it the same way I did and I did have the vacuum booster replaced under warranty.
When it takes a dump, you'll know it, limp mode, lots of lights... this might be what you have, op.
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