I use a Isuzu 1.8L Turbo diesel in my car. The problems that I am facing are the following.
Excessive black smoke while driving (all speeds)
Low pick up
Engine temp always high with AC
I have done the following work on my engine
Replaced rings with a new bore, Valve and valve guides. Have done the proper run in for 8000 km, changed the nozzle and delivery valve and had the pump & injectors calibrated. My turbo oils seals are not good and I have oil traces on the intake manifold after those runs exceeding 90 kmph. I have tried reducing the diesel flow, played around with the pump timing. None of the mechanics were able to suggest or rectify, they just cud say, Isuzu has excess smoke. I would request members to suggest to me a step by step approach which I can & will do. I do not wish to give up on this till I rectify. I can remove the turbo as a first if needs to be done.