I have a 2000 TD42 that devolpes almost no power untill it reaches about 2000rpm, I have done the following, 3" exhaust with 72mm? dump, EGT & boost gauge, Fitted factory nissan intercooler, Turbo hi-flowed by MTQ, I also played with the fuel screw and boost compensator by taking one of the shims out and rotating the plunger several directions but these made no difference, could my pump need a rebuild? I noticed the plunger had some "chips" in the chrome on it.
It starts very easy and runs smooth, although at about 1500rpm when cold it flutters a bit after it warms up no probs.
At 18psi and EGT of 520 deg it is producing 95kw at the wheels but still nothing down low, what should I try next and what order?
My thoughts were: Valve clearances, Injectors, Inj Pump rebuild (costly), Inj Pump upgrade with 12mm plunger ( more costly ), Inj pump timing?
Any help regards Dave