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if you have the 6.0 then the filters are located on top on the motor right beside your oil filter and under the drivers side on the fuel pump, check to see if you have diesel in your bowl where the fuel filter is, no diesel in there your fuel pump might be dead, check fuses to fuel pump and check relay on the passengers side kicker panel, check your owners manual
You just can't turn up the turbo boost any more with the new engines. If the turbo start to boost more then the PCM is programed to, it will cut the fuel pressure down and you loose more HP. Here is a link for you if your looking to get good HP out of your 6.0 liter diesel. You can replace the wast gate for the turbo with a higher PSI rating but your going to have to by a electronic boost builder for the PCM so it will not kill the fuel pressure soon as you start making more boost. http://www.thoroughbreddiesel.com/bd-diesel/turbo-boost-builder.htm and http://innovativediesel.com/ Good luck and hope you get the HP your looking for to get out of your engine.
What you have described is a classic turbo air leak. Check the clamps & air lines from the turbo to the intake. If you do not find an air leak (you should be able to hear the air escaping) it will be a turbo problem. Unlike gasoline engines too much fuel in proportion to the air will cause the vehicle to run hot and also to smoke.