I’ve blown 4 turbos over the years, each time they’re working great and BOOM !! Never had one quit and work then quit. Sounds more like a turbo boost sensor/or wiring to it. When my boost sensor went bad, It Sounded funny when it lost boost, no power, wind it up and it would boost some. Maybe you have an intermittent boost problem. A plugged fuel filter, will limit power, making boost impossible. Anything that affects performance will affect boost ability.