2021 growling noise during engine start-up

My 2021 Limited has been making a deep wooof kind of sound at startup, and it seems to be when my air conditioning was left on. In fact, in one instance the truck made the sound when I turned on air conditioning shortly after start up. Don’t know if the compression load is requiring the throttle to boost or if the air emissions system is gasping briefly to take on compressor back pressure.

 

Probably old thread but my 2021 makes the taping sound like most Finally tracked it down to fuel injectors an fuel reg .Injectors sound like ball peen hammer banging with a stethoscope. No valve train noise like I was thinking