Hey guys, having an issue on a 2013 f150 5.0. After giving the truck some throttle after start up around the 1000rpm range, im hearing an loud humming/slight roar sound. It then goes away in the higher rpm range. stock everything, no trouble codes, just annoying. Any advice/help? Thanks

 

Oh wow, the help from this was overwhelming. I'm going to pay it forward. It was the water pump. 65,000 miles, and the seal was not leaking. i guess the shaft bearing was going out. Hope this will help someone out.