My F150 makes an occasional whinning noise in cold weather. It gets louder or quits by increasing or decreasing RPM. Doesn’t matter if radiio or climate control is on or off. In warm weather it doesn’t make the noise.
Is This One Of Those Generic F-150s Or Does It Have A Model-Year ?
If it whines in park a piece of heater hose used like a stethoscope can help pinpoint the source of the noise.
2005 Ford F150 XL 8cyl ext cab 4x4
I haven’t noticed it in park only driving and it stops when you speed up or slow down.
the cat skin will vibe and make a buzz sound