2001 F150 hums while in idle only

[Syrch]

I have the 4.6L engine with roughly 85k miles on it. The truck runs great. No spudder nothing while driving. While it is idle there is a hum from the engine. IIRC this started to happen after the last time i had the belt changed. Does this make sense? Could the belt be too tight or the wrong one?

This only happens while idle and when i apply gas its gone. It will happen if im going above 0 but again only while there is no gas applied.

 

[Zenmervolt]

New belts tend to hum or whine a little until they wear in. As long as it's not a grinding or squealing noise you should be fine.

ZV

 

[Syrch]

well this was honestly a few thousand miles ago. Its just gotten to the point of annoying me.

 

[The Boston Dangler]

when giving it some gas, is the hum drowned out by other noise, or is it actually gone?

 

[Syrch]

its actually gone.