NEED HELP WITH Humming sound?

[fordbrat72]

:exp: Have a loud humming sound coming from the air filter area. I believe it may be the Mass Air Flow sensor gone bad. I have changed the air filter but it did nothing. gets louder the longer the vehicle has been running. Can anyone please help me??

 

[prerunx]

Yes any info on what that is would be great! My brothers ranger does the same thing.

 

[dogfriend]

Not the MAF, it is the IAC valve. It is very common on Explorers.

Check this link