Hi bloke. I'll have a crack at yours.
Shuddering a bit. Not knowing if this is your first diesel,have to assume it may be.
The rev range and tourque created within that range will take a little run in period for you the driver.
It may be a case of you expecting the engine to behave in a petrol manner.
The torque in a diesel comes on differently and is less aggressive than a petrol, generally in a narrower band.
Staying, as much as possible, within the band, will greatly improve the performance, overall driveability and economy!
Diesels don't like to be babied! Drive it with a firm right foot in it's rev range. Labouring won't 'harm' them but idling for long periods will glaze the bore, where avoidable don't do it.
The sooty problem. Check out the two stroke oil thread in general nissan patrol chat. Give that a crack for a couple of tanks and monitor it.
Could be something to the sea level thing, really don't know. Upgrade your air filter? May need a hi flow filter in a lower oxygen situation? Check with the local diesel mechanic/spare parts store?
All I can come up with bloke. Hope it helps.
Cheers, Rob





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