I have a 2000 7.3 motor was running great with no issues or problems until this week. i filled up saturday and a while after my truck started to run bad at mid rpm's like around 2000-2300 it starts bogging if you let off it starts to run fine again but gets loud like if it is starving for fuel. i already burned all that diesel and refueld since. same issue. i had all 8 injectors done a year and a half ago. can this be the fuel pump i have never changed it in the 4 years i have owned the truck. truck has about 300,000 miles. and im running a superchips programmer 1705. does it even with the programmer off.