Taking into consideration that I have spent a lot of time and effort on my TD4 it could be the crankcase vent filter that needs to be replaced or a leak in the intercooler pipes, mine had the same problem and now eventually the Turbo died a sudden death after 370000 km !
Remove engine cover. Remove plastic cover over injectors. Camshaft sensor is in front of the oil filler cap, 3 wire black connector. It's held in by one E-Torx bolt. Remove the bolt and connector and it pulls straight up.
changed engine
The black smoke that a diesel engine blows out is fuel that is unburned. The black smoke can be caused from over-fueling, poor fuel quality, or dirty or worn fuel injectors.
Unburnt fuel in exhaust.
unburnt fuel
In a diesel engine, blue smoke is an indication of oil being burned. Black smoke means that there is incomplete combustion of the fuel. White smoke can be seen when raw diesel fuel is not being burned.
Starter Relay Isuzu Trooper (Diesel Engine) located in fuse box (engine room), grey color. They have 4 relay (Power Windows-black, AC-black, Engine/Alternator-blue, and Starter-diesel engine-grey)
Their injection pump is set too rich, and lets more diesel into the engine than the engine can burn. The partially/badly burned diesel is what comes out as black smoke.
oil fill on a 7.3 diesel is on the passenger side of engine about 1/3 of engine length back from the front of engine this filler has a black screw on cap with a picture of an oil can
replace or rebuild engine, its kaput!
Left side of engine block, under black plastic screw on lid.
YES. But due to carbon build up and blow back within a diesel engine you will still need to keep to your oil change scedual and can not extend it. Diesel oil turns black quickly.