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check the oil level for over filling. Check correct viscosity of the sump oil in use.Have a compression test done to check for wear as this may be from excessive blowby. Check the air cleaner is clean as the turbo may be sucking air from the sump area as the air inlet may be partially blocked (air filter)
if its black smoke and id say it is being a deisel it can be injectors or just simply fuel pump timing. get it to a deisel specialist to check the pump timing and your fuel load under acceleration, only real way to get it sorted.
Check the intake pipes from the air filter to the intake on turbo in case its got a air leak and its sucking in dust and grit ,If i knew what was being damaged in the turbo i would have a better idea ,if its the bearing then it has problem with the oil feed being partialy blocked with gunge from lack of oil changes which is the normal reason
sorry without a turbo it will feel like its pulling a load ,but as for being extra slow ??? the main cause of this is a either a low transfer pressure in the injector pump or the injectors are dribbling ,best advice here is to take it to bosch injection specialist and ask them to check the injection pressures .And get some sort of price as this work is very expensive ,if i have a injector overhauled iam am looking at around 150 euros per injector and a pump at about 600 euros and this is if i dismantle them
The fuel pump is located under the turbo on that truck. It is most likley washing sediment/old fluids out of the vally of toyr engine. It is also driven by a push rod that ths cam drives, so the lower pump o-ring may be leaking too. You can change the fuel pump without pulling the turbo. Good Luck
what doesnt work ? the turbo ,
they arnt the most powerful engine in the world but reliability is outstanding subject to oil , filters and cambelt changes, at the correct intervals,
the engine should give good mid range touque with a little smoke , if it doesnt the chances are the wastgate on the turbo is leaking especialy with the milage , but to be fair on a car that age i would probably put up with the lack of power than spend money repairing it providing its running ok
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