Turbo Overspeed???!!!!!!

[Rawze]

(04-04-2019 )TruckDoctor Wrote:  Still working on pinpointing the issue. have monitored it with the factory file. spitting a 0629 and fault 3348 turbo compressor intake pressure codes. with the factory file truck actually completely shuts off while driving down the road. pressure tested boost system, and also ran a evap smoke machine through system. not seeing any loses anywhere however truck shows when monitoring only 24 psi of boost maximum, but the damn turbo spinning to the moon. I'm starting to wonder if we have a turbo issue. I'm going to recalibrate the vgt and roadtest with manual gauge on truck and monitor data. something isn't right. Just going to have to get to the bottom of it. 128,000 rpm of turbo speed and shi#t boost isn't adding up.

maybe impeller(s) may be worn down from dust/dirt ingestion or carbon packing wear?