Before replacing or cleaning anything, TEST it! This prevents wasted time and effort and helps you to be sure that the work you do will be able to correct the problem.
Search for "personal facial vac" for the thread that tells how.
Steve
98 Contour SE Sport 2.5 Duratec ATX The wifey's car
89 Taurus SHO - 246K miles
94 SHO ATX - 190K
1997 F-150 5.4L ATX - The Workhorse 150K.
ANY THREAD WITH "OMG" or "WTF" ETC IN THE TITLE WILL BE IGNORED!
