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      11-19-2012, 01:29 PM   #16
First Lieutenant
Ferruccio's Avatar
Drives: 2010 335i
Join Date: May 2011
Location: Colorado Springs, CO

Posts: 315
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Sounds like a misfire to me! I've had some pretty scary feeling misfires before. Most of mine went away with replacing the plugs. I still need to replace a coil or two.
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