whining noise

[tnoel]

I have a 98 ford expedition eddie bauer 5.4. I have been hearing whining noice at low speeds. It sounds like an old stereo that needs a noise filter. I have replaced belt, belt tenssioner,. It does not do it all the time.Thanks for the help.

 

[buildingdoc]

If it changes pitch with engine revs... could be a loose ground. Could also be a tire/wheel bearing issue as well.

I am having issues with a humming at idle with my IAC. I am suspecting that the intakes are very sensitive so you may want to check the air filter for any restrictions that can cause the whine at a certain throttle rate.

hard to be more helpful without hearing it.

Good luck.

 

[tnoel]

yes it does change pitch with engine rev it actually stops when shifts from 1st to 2nd then starts up again then stops when get up to speed. If i let my foot of gas it will stop also. Thanks for the help.