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      11-06-2010, 12:22 PM   #29
RON1X
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Drives: 997.2 C2, '13 Audi Allroad
Join Date: Aug 2009
Location: Nashville, TN

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2008 E92 M3  [4.50]
there have a been a few threads about this, and it seems to be the newest software and how it primes the hpfp (possibly) prior to starting. I too was getting rough starts but after a minute of idling, no codes or anything and then the car ran completely fine.

Although, after I complained about it to my dealer (it took 2 times...) they replaced the hpfp and the car starts right up now. It is always something with the n54