whine under hood
Hi. I just bought a 2005 F150, 5.4, 47000 km. There is a high pitched whining noise which occurs intermittently, doesn't seem to matter if the truck is warm or cold. It comes and goes, and when it happens it lasts a few seconds. I once noticed that it seemed to occur when accelerating, but I am not sure if the two are linked. Again, it doesn't just happen during startup, seems to come and go even when the truck is completely warmed up.
I have had it to the dealer twice for it, once they heard the noise but it didn't last long enough for them to determine where it is coming from.
Anyone experience this and might know what it is?