99 & up 7.3L Power Stroke Engine & Drivetrain
Hello, i have a 2000 f350 7.3L and I have been experiencing a weird hissing noise. Whenever i let off the throttle my truck releases a huge amount of air which I am assuming is the wastegate actuating. However on the highway in 3rd and 4th gear there is a constant hissing noise and the more i...