Thank you po sir Jett, for the input

I'm glad to hear na na-ayos po yung issue ninyo hehe, so replacing the injector nozzle fixed the issue? Saan niyo po siya napagawa and magkano po inabot?
Sir Omzhky, kung napalitan niyo na po yung air filter, fuel filter and your turbo's fine, but prevalent pa rin po yung black smoke, then I guess ipa-calibrate niyo na po yung injection pump niyo

Black smoke indicates an imbalance to the air to fuel ratio; that there's either too much fuel added or not enough air resulting in incomplete combustion but then again, since you're turbo's fine, the issue's more likely with thefuel injection pump putting out too much fuel. I also think this is the problem with our Pajero as well (our EGR valve is also blanked already, by the way) and will definitely have it checked/calibrated if necessary when I get the chance. Hope your issue gets resolved, sir

Does anyone know po if the 4M40 from the 2002 Fieldmaster uses EFI or still the mechanical fuel pump? Because I've heard that on the older models, the mechanical fuel pump had an adjustment screw to reduce or increase the amount fuel.
On another note, I also definitely think the glowplugs are shot, numerous cold starting problems when the engine has not been run for at least a day. Massive shuddering when starting and the engine dies unless I provide throttle input and during these moments (30 seconds to a minute at most), the engine sounds and feels like it's misfiring. When fully warmed up, though, everything's smooth. It may also have something to do with the injection pump, but I've also read about the 4M40's known appetite for glow plugs hehe
