Quote:
Originally Posted by chetman7
I did not as I was getting it ready for winter storage. It's been on the tender ever since and have not heard it. But I feel confident if I took it off the tender for several days they noise will come back. I ran it for codes and there wasn't any of concern. Not sure how it's linked to battery voltage ,but if it's only reproducible under those circumstances I'm not worried about it being a valvetronic issue
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My M4 has just recently began to show some valvetronic errors also and makes the dreaded woodpecker noise when I unlock the doors etc, I also found that mine completely stopped for a few days after I tightened my battery cable connections but then reappeared a few days later when I went to unlock the car, very weird...Might try keeping my battery topped up and seeing if that helps!