NO BOOST

[Rawze]

(11-03-2017 )axe Wrote:  You programmed the truck. Took pipe loose from turbo outlet and it will blow the hat off your head. No vacumn at idle. When he first noticed slobbering, replaced hoses on turbo side and cleaned it all up. Drove it 1400 miles home and oil was puddled up in new hoses, so he opted for new turbo. He tested entire system for leaks, you showed him how when he was there. That leaves derate. Could it derate with no check engine light on?

yup, there are silent derates that protect the engine that can throw no codes sometimes on the 871. I would suggest he take it to one of the guys mentioned and have it looked at before jumping to conclusions though. could be a lot of different things.