You mentioned replaceing the lift pump, or, have you also replaced the injection pump?
The 216 code is the death code for the VP44. It is a timing failure. Normally, comes on the heels of running the truck with low or no lift pump fuel pressure.
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High Rider: 98.5 Ram 2500 4x4, 5 Spd, SB 13", A3000 turbo, DDP Stage 3 sticks, studded, 4" TB,, AEM Intake, Gauges, FASS95, S-Chips Tune
Low Rider: '06 Chevy 1/2 Ton, Victory Red, 2/4 Drop, roll pan, sport mirrors, rollin on 20's