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Message: [QUOTE="KCTurbos, post: 1006952, member: 13852"] Well I am more of a 6.0 powerstroke guy but I think some of the same priciples will apply. Please excuse my ancient 6.0 language. Do what morganY said... make sure to check those figures are right first. Can you check to see if the vgt is cycling. You should see the vgt duty cycle going up and down as you drive... it should not be locked in any 1 position. I have seen plenty of garrett turbos come straight from the factory with the following issues... bad vgt solenoid, gears off on the vgt swing arm preventing full motion, vgt oil cavity empty causing the vgt not to cycle right until it fills up with oil. All these issues can cause two things... first the truck wont run right... then the computer will see weird values and lock the vgt duty cycle turning your truck into a laggy pig. I have also experienced customers that installed a big vgt turbo and did not go through a relearn process and the computer did not like the new ebp/map numbers it was seeing and would go into default mode. The same thing can happen sometimes if you have an exhaust/boost leak and the computer does not like the ebp/map values and can go into default mode. Try resetting the kam, clearing all codes, and then do a vgt re learn process so the truck does not freak out once it starts seeing such weird values. Hope that helps a little [/QUOTE]

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