I have a 2004 Isuzu Adventure 3.0-litre turbo-diesel. It is suffering from hard starting and gradual loss of power. I have taken it to several dealers and they say there is nothing wrong. Can you help me? Some parameters of the systems would be a great help. EGR, Fuel Pressure, testing computer, etc.
It could be a fuel supply problem, so I would suggest checking the fuel pump.