Coming from work this afternoon, I was doing my same old routine when I yielded, then gassed on it about 3/4-5 throttle and it sputtered like a gasser with a rich mix, right after that anything over 50mph I got a whislte/ringing noise(like cross between bad alt. and turbo at low boost) coming from inside the engine bay. Worried I came home, went inside, ate, and went back out to the truck. Ran Dia. with the predator, no codes, derated truck from 85hp to 40hp. Got in the truck with my cousin and drove down road... nothing until about 5/7 the way back home then did same noise. What the heck!! Any help would be great!!! I am leaving tomorrow going hunting and planned on driving my d-max.... is it serious... can I drive it?