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  1. E39 M5 and E52 Z8 Discussion
    I just replaced my valve cover gaskets 2 months ago. The car seemed to improve and no SES light for 400 miles. Then, everything went back to the way it was, except that my rough idle when cold was about 90% better. I removed the plenum to try and locate a vacuum leak yesterday and did not find...
  2. E39 M5 and E52 Z8 Discussion
    I've been searching for a while, but haven't found much. I have this sneaking suspicion that some crusty grey beard is going to tell me to use the search button. Sorry, I tried and failed. I just got a 2001 M5 a couple months ago and plan to get the Evolve Alpha-N tune soon. I am getting 60k...
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