SHELBY GT 350 Member
Joined: Sep 2010
Location: see user name
Probably just turbulence related noise being generated from the IAC and resonating down to the airbox.
No codes and car runs good? I probably wouldn't worry about it much then.
2001 GT Convertible
All the usual bolt-on's /200 I6, C4
And a few Explorers too... 2008 4.0 XLT 4x2, 1996 XLT 5.0 4x2, 2003 Sport Trac XLT 4.0 4x4
Last edited by SoCal2V; 02-03-2016 at 02:45 PM.