I usually park my Pilot on the driveway (Detroit, MI), when I start the vehicle first time in the mornig I hear a brief egine noise for a second (its like over starting) and won't happen again the rest of the day. I 've noticed it happenig only when temparature <30F and won't happen if temps>30F. My dealer was able to duplicate the problem, Since its been happening only first time in the day+ for a brief sec he said he couldn't fix the problem. To be able to fix the problem he said , It should happen more frequently and longer time. He thought it could be a starter problem but couldn't fix due to above reasons. Any one has similar problem or experince especially our Canadian friends or members from colder climates. Finally, should I be concerned about this problem since its been happening in colder temps , only first time in the day and for a brief sec.