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      09-27-2011, 02:07 PM   #61
M3Now!
First Lieutenant
 
Drives: 09 E93, Jerez Black
Join Date: Sep 2011
Location: Texas

Posts: 372
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Re idle when cold: My M3 rumbles and sounds rough at start, for about the first 15 seconds or so. This concerned me, so I checked three other brand-new M3s, and they all did the same thing.
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