Ratsan_Fratsan

I have a new noise. Between 55 and 65mph there is a high pitched buzz. I cant pinpoint it but it sounds like its in the vicinity of the engine.

So as I accelerate past 55mph the buzz starts and steadily gets louder and higher pitched until it vanishes around 60mph. Its not vary loud, you cant hear it if you have the fan running full blast.

I tried to record the sound but you cant here it in the recording.

Any thoughts?


2005 5.4L 4x4

corey_lax

Check the plastic cowl at the windshield. If its loose, it will bounce up and down quickly making noises.

Try taping it down temporarily and see if the sound goes away.

Ratsan_Fratsan

Unfortunately that's not it. It's getting louder and I am thinking its a bearing.

beantown617

Is it only when really cold out?

Ratsan_Fratsan

It's been nothing but cold sense the noise started but it was cold before the noise started.

beantown617

Try searching for the thread "high pitch whistle noise when cold out" i started. May be similar to your issue, maybe not. Worth a try.

Ratsan_Fratsan

Thanks, I found the thread and I think I have the same thing.