Humming...noise from air intake?

[Council2]

2003 xlt 4.6
I am getting a random humming coming from the air intake once in awhile. If I accelerate the noise will stop until I go back to an idle, sometimes itdoes not make the noise sometime it does. Have check filter and that does not seem to be the issue. Anyone had similar or know of some ideas to look into?
This is all stock, no fancy stuff, just got the truck a couple of months ago and I'm loving it.

 

[KC Dave]

Does the 03 still have an IAC valve on it? (Idle Air Control) If so, Try cleaning that first.

 

[Council2]

I am not sure but, that is more info than I had before so I will look into it. Thank you.

 

[rburch]

I had this problem and it was the IACV. Cleaning it didnt work for me, it was like new when i took it off. Replaced with a new one and problem solved!

 

[markmiller]

I replaced IAC also. Sounded like a horn in the intake at idle.

 

[Council2]

I tried cleaning it but to no avail. So picked up a new one and replaced, been a week and problem solved thanks for the help!

 

[buildingdoc]

I just put a new IAC valve on my 04 4.6. I got the humming with a brand new one on there. truck runs really good with the new one, except I get the humming at idle. Should I take it back?

 

[rburch]

Yes take it back and get another. I had the same problem when i replaced mine!

 

[buildingdoc]

Any specific brand. I got an aftermarket (BWP) at oreilly... and also found people with F150's 4.6 having the same issues with motorcraft as well.

 

[rburch]

I got both BWP. I dont think brand matters. BWP is cheeper than Motorcraft.

Then again i never have had ANY luck with Oreily parts! It was the closest at the time!