Recently just started noticing a weird noise coming from the engine at WOT. It sounds like almost a piece of metal flying around inside the engine and when i let go of the gas, the noise slows down a little and then abruptly stops. Never noticed it before until a couple of days ago. Suggestions? Thanks

 

Sound like upper end or lower end? Heavy piece of metal or more like sheet metal?

 

Upper I think and its not a heavy piece of metal, just a small piece but that might not be it

 

Edit - User failed to respond.

 

Sounds like an injector making racket, exhaust leak, or a loose spark plug to me. I don't know what a DWV mod is but...

Is it only at WOT? What gear(s)?

 

DWV mod is basically the gott's intake mod and it happens when the truck downshifts and hits the 3500-5000rpm range