hi im new to the site and i just bought a 95 chevy 2500 turbo diesel with the 6.5L. i noticed that when i really step on the gas and get the rpm's up to around 3000 the motor starts to make a sputtering noise and loses power. its fine in the lower end. i just replaced the fuel filter in the engine bay and i saw no improvement. anybody out there that can help me figure out the problem? whether it be injector's, IP's,or what. the truck has about 180,000 miles on it also. please help!