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      04-06-2013, 05:29 PM   #4
kscarrol
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Drives: 2011 E90 M3
Join Date: Jun 2010
Location: New Orleans, LA

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Agreed, likely the lag issue but do check which drive logic mode you are in. I have found that if you are in 4 or 5, the throttle blip when downshifting can cause a feeling that the car is surging. Especially if you are expecting some engine braking with the downshift!
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2011 Space Grey E90 M3, DCT, Comp. Pkg.
1997 Z3 2.8, Artic Silver, Tanin Red interior, MT
1974 2002tii, Inka, 5 sp manual
BMWCCA # 327475