help!!!! 12 valve diesel no power!!!

I have one slug of a truck.A chip won't work on my 12 valve engine.I checked my fuel pressure and it is fine.Do i need to put in upgrade marine injectors?

no, what you need to do is provide more info to work with. What exactly do you mean by no power? is this a new thing, or has it come on gradually, how many miles, what year, etc... get back on that and I can make a load of suggestions that will make your life better

my truck is a 98 and it has been a slug since it was new.The dealer says that it is normal but i have driven other stock dodges that seem to have ALOT more balls.It now has 70,000 miles on it and is the same as the day i bought it.Maybe it's time to just buy a powerstroke!

More info needed...and don't switch to powerstroke. You have the best already!

What seems to be the problem??? what kind of boost are you getting? is you air filter plugger? what size exhaust does it have? is the fuel econ bad?why is yours sluggish compared to the others you have driven? if you give us a little more to work with we may be able to help.