My Concours burns a bit of oil and starts to run rough every 10,000 miles or so. I normally just put new plugs in or clean and gap (I think the oil burning causes the electrode to burn down quick), clean or replace the coils and clean the module area (including the ground wire) and it runs good for another 10,000 or so. I am having this problem again but it appears to be only one bank of of cylinders (all 4), this has been verified by an inductive pickup timing light although it was a few months back and now can't remember if it was the front or rear bank. Any thoughts on what would cause a whole bank of cylinders to miss fire? No codes of course. Thanks in advance.