My 2005 Lwb GLS DiD has just had it's 120 000 km service. It seems as if the engine is down on torque after the service. If it was a petrol engine, I would say that the timing is too advanced, but am not sure how that translates to diesel.
The engine runs well and revs easily, but seems to have to work a bit harder going up hills. Any idea what can cause this?