What is this noise? 2000 7.3 power stroke
Hydra tuner upgraded transmission and straight pipe is all the mods on the truck. It has only made this noise when towing uphill mostly when the engine runs at higher rpm above 2200 engine oil is about 215f the boost stays consistent and so does the egt the vid is short but would make the up and down whining noise for as long as I held the rpm. Do I need to re tune I am also adding a intercooler and intake soon for cooling so maybe that would help. Sounds like the turbo