i have a 1999 2 wheel drive dually 5 speed when your just driveing along first second gear it misses really bad between 1700 1900 rpms just had lift pump and injection pumps replaced but when it does this if you give more throtle it will clear right up and run only does it when tryin to just drive slow any help would be great thanks

 

Which LP ya got? I got one from Care Quest bad right out of the box. What's your FP? New fuel filter right?

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DDR are all junk

 

Could be air in fuel system...crack the lines while running, making sure there's no air bubbles