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      01-07-2013, 11:03 PM   #194
E92 M Sport
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Drives: 2016 F82
Join Date: Aug 2012
Location: NJ

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Originally Posted by Jeohn View Post
I replaced the plugs after unsuccessfully finding a socket (in laws own a machine shop, so machined a 14mm 12 point deep craftsman socket to fit)

After replacing the spark plugs I no longer have misfire's that the ECU detects but I can still hear a misfire and feel the vibration from the engine as it misfires.

Again this is only when the car is cold. After running for roughly 10 minutes at Idle everything feels normal again

Any ideas my friends?
Dealer replaced 3 injectors (bank 1) a few months back for me and solved the problem. Mine didn't idle rough for 10 minutes, only a minute or two, and only when cold temps arrived.
2016 M4 MW/SS 6mt