Hi. I need some advise please. Our 05 plate fusion has a whining noise. It's not engine related
The noise sounds like the one you got as a kid when you placed a blade of grass between you thumbs and blew across it
Here are my observations
It only occurs at about 75mph or above
Open a window a crack it stops.
if driving into a wind it starts at a lower speed.
with a tail wind the starting point is a higher mph
heater fan or off has no effect
postion of air flow has no effect.
I suspect the onset is air pressure related
Has as anyone ever had a similar issue or heard of itand if so how was it solved or where do I start looking to solve