Turbo Overspeed???!!!!!!

[TruckDoctor]

Well a few times in life you hear the good old saying KISS. Turns out although the guys 4 trucks were maintained by an outside source, two of the trucks had dirty air cleaners in the from going into the landfill. The two trucks with dirty air cleaners were over spinning the turbo to try and compensate for the boost loss from the dirty air cleaners. With the factory file the truck would go so deep into protection mode it would shut the engine down while driving. O'well sometimes you win some and sometimes they kick you in the butt. A good reminder to keep it simple stupid and always double check the basics before anything. Kenworth's air cleaners are not so accessible as other manufactures. Should just change it when you're in there. Glad the customer is back up and operating. Thanks @Rawze for the help.