Attention: TDR Forum Junkies 
Thanks in advance for any help you can offer.
I am experiencing an intermittent low power problem with my 99 2500 24V with 160k miles on it. After cold start (say 4+ hours off), the truck runs REAL rough and produces LOTS of blue smoke on throttle up. Once in a while running the throttle up hard after a few seconds will bring everything back to normal, other times throttle will go to the floor and engine will not get past say 1500 RPM (lots of blue smoke). Key off and restart immediately returns things to normal 8 times out of 10. Same thing occasionally happens after about an hour at fairly constant highway speeds. It feels like the truck goes into “limp home mode”. Slowing to an idle, even for a second will often fix things. If not, key off and restart usually will.
The first occurrence was at highway speed, as described, on the first trip after an oil change. Problem first appeared 1500mi ago.
I have run a Blue Chip Fuel Management System for about 60k mi, and the problem remains with the FMS installed or at home on the bench. Problem remains with or without cruise control on and with or without OD. When the FMS is in and the problem occurs, it is clear that the VP44 fueling is stopping at 16. you can go lower but no higher, no matter how hard you push the pedal
Radiator/ oil levels constant, no water in oil nor oil in water. Code often set is 0216 (injection pump timing malfunction). A code related to turbo boost low signal sets occasionally. Both codes seem unrelated to presence of the FMS.
I started by replacing the lift pump (as pressure at WOT was marginal and it was getting ready to go, have been through 4 of those now and I at least know what that problem looks like). I moved on to new injectors (because hey, there was an outside chance it could have been them, and why not take the chance to end up with some more HP in the worst case). I then bit the bullet for the 3rd VP 44 (original had about 95k, second 65k) as I kept getting that 0216 code. I thought I had it licked, but did not. So Bosch has a dandy good VP44 to rebuild. Finally, I looked at the MAP output signal on a digital volt meter. It looked like voltage would drop for a split second on throttle up, and only when the problem was occurring. I was sure that I had found it. New MAP and same problem.
Deficiencies I believe unrelated but running out of ideas: No speedo under 20 MPH for last 25k. Brake and ABS lights on (good pedal and pads/ linings, check every 5k) for last 30k. When keying my 33mHz fireband radio, full throttle acceleration retarded.
Ideas??????? ECM? IAT?
Sorry for the long post, but you guys are good and need the details.
I am experiencing an intermittent low power problem with my 99 2500 24V with 160k miles on it. After cold start (say 4+ hours off), the truck runs REAL rough and produces LOTS of blue smoke on throttle up. Once in a while running the throttle up hard after a few seconds will bring everything back to normal, other times throttle will go to the floor and engine will not get past say 1500 RPM (lots of blue smoke). Key off and restart immediately returns things to normal 8 times out of 10. Same thing occasionally happens after about an hour at fairly constant highway speeds. It feels like the truck goes into “limp home mode”. Slowing to an idle, even for a second will often fix things. If not, key off and restart usually will.
The first occurrence was at highway speed, as described, on the first trip after an oil change. Problem first appeared 1500mi ago.
I have run a Blue Chip Fuel Management System for about 60k mi, and the problem remains with the FMS installed or at home on the bench. Problem remains with or without cruise control on and with or without OD. When the FMS is in and the problem occurs, it is clear that the VP44 fueling is stopping at 16. you can go lower but no higher, no matter how hard you push the pedal
Radiator/ oil levels constant, no water in oil nor oil in water. Code often set is 0216 (injection pump timing malfunction). A code related to turbo boost low signal sets occasionally. Both codes seem unrelated to presence of the FMS.
I started by replacing the lift pump (as pressure at WOT was marginal and it was getting ready to go, have been through 4 of those now and I at least know what that problem looks like). I moved on to new injectors (because hey, there was an outside chance it could have been them, and why not take the chance to end up with some more HP in the worst case). I then bit the bullet for the 3rd VP 44 (original had about 95k, second 65k) as I kept getting that 0216 code. I thought I had it licked, but did not. So Bosch has a dandy good VP44 to rebuild. Finally, I looked at the MAP output signal on a digital volt meter. It looked like voltage would drop for a split second on throttle up, and only when the problem was occurring. I was sure that I had found it. New MAP and same problem.
Deficiencies I believe unrelated but running out of ideas: No speedo under 20 MPH for last 25k. Brake and ABS lights on (good pedal and pads/ linings, check every 5k) for last 30k. When keying my 33mHz fireband radio, full throttle acceleration retarded.
Ideas??????? ECM? IAT?
Sorry for the long post, but you guys are good and need the details.
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I will also throw another filter on it, just to be sure. It isn't showing on the gauges but... well you know. thanks again. 
) plus a Blue Chip Pump Cover 
Turned out the problem was an ECM that had been soaked from sloppy fuel filter changes, and the pins that were going into the ECM were not making good conact,, so with engine vibration the VP44 was not getting proper signals to inject. 
Merrick, stop by for a cervesa next time you are in the Northeast. Brian
