So on my way to work this morning I noticed a loud hum coming from front. When I took my foot off gas it went away seemed to happen around 50mph. Not sure what is going on but I did replace air filter the other day with K/N and checked to see if everything was tight which it was. Also it was 18 degrees this am when I heard this.

2018 F150 XLT

Anyone have any thoughts?

 

IWE maybe? Have you noticed the humming before? Is it intermittent?

 

Its intermittent i think and just noticed it this morning. What is IWE?

 

At 18 degrees for a low, what are you warming up to? Do you notice it go away after the truck is fully warmed-up?

 

This is when it was fully warmed up. It could just be me. I will see if i hear it on my way home tonight

 

Ive been chasing a humming/buzzing when cold. It happens to me around 30 mph in 3rd gear, every time. It goes away when its cold, however. I'm starting to think its a heat shield somewhere that wants to make noise.