Diesel Bombers - 2002 Dodge 3500 injection pump

Hello all. Been lurking on the site a whille, finally signed up.
i have a 2002 dodge 3500 4w4 flatbed with small mods. Truck is 245 hp w 6 speed tran.
Stuck the 4" exhaust out behind cab. In order to make room for the braden pto winch on the rear of thr truck.
I replaced the stock fuel pump about 2 years ago with an Airdog 100, hoping to get a little more more life out of the stock injection pump. Also replaced the apps throttle sensor that i replaced about a month ago. Still same dead throttle, so i checked my dash readout
It said p-0216.
My truck is 245 horse and might want a soup up injection pump, not sure. I already have a set of bosch injectors . If i could get some estimates and i will decide which path to take.
Thanks for your time.
Noel.