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M3 Rough Idle on startup--normal? (archive)

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Posted by JST on September 13, 2001 at 19:14:04:

Looking at a 98 M3C. On initial startup on a damp day, the engine idled rather roughly for 15-20 secs. before settling down. IIRC this is a normal feature of the S52 engine--correct?

Also, what are the warning signs (if any) of over-rev caused damage? Is there any way to check for this other than scanning the computer?

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