truck is stock, 05-2500 ,except for edge ez that i run every once and a while. hasn't been hooked up for 4-5 weeks, (waiting to buy and install gauges ), has new air filter, and fuel filter. run ps in it every tankfull, truck has never thrown any codes and feels sluggish. turbo doesn't seem to wind up like it use to,with the feel as when it was new,. boost seems lower by feel of seat in the pants. while driving under normal cond. , step on pedal and truck responds decent, but some times motor seems like it just revs up , makes a lot of noise but doesnt go anywhere. is this normal with our current conditions of temp. being mid 80's to 90's and high humidity ? or a'm i just use to the normal power. any help would be appreciated.