Intake Whooping Sound??
I bought my truck used and it has had this "whooping" sound coming from the air intake / filter area at idle. You can here it even more so from the front of the truck where the air box connects behind the grill on the drivers side. It has done this with the stock filter and air-box. I have and Air-raid filter in now and has the same sound.
Has anyone experienced this sound with their truck? Is this a normal sound? If not where should I look for a possible problem? Could it be a resonating noise coming from the new style air filter / air box design?
Thanks in advance!