trouble
SDD Junior Member
Have an early 99 superduty and while towing the last two times I have noticed that the turbo sounds different. Still making the same boost levels, however, not smooth like it used to be. I believe I am hearing it surge. It almost hurts my ears when it does it. Truck used 90% for towing and has 205000 miles. Turbo is original. Is it starting to go out?