Bobwplace

Hi, a new member. Have 2001 LS430 with ultra, bought in 2005 as a CPO, 49k. Now has 87k. On cold start-up, hear fluttering noise coming from area close to in-cabin air filter (glove box), lasts 10 to 20 seconds. Left with dealer overnight so they could do a cold start-up. They heard the flutter, said it did not last long enough for them to determine where and what it was. In-cabin air filter has been changed twice. Car kept in garage. Driven 6 -8k miles a year. Appreciate any help. Bobwplace