Nissan Navara 2007 Problems

Check the injectors, your problems are most likely there.

There are systems available for the Navara and there are vehicle running well on LPG, but some specialists have reported problems getting the gas injection timing correct with the Nissan’s variable valve timing system. One uses a liquid injection system, which has the same injection timing as the Nissan’s petrol system along with the same combustion temperature, and that appears to work well. If you’re going to do it make sure you choose an experienced and competent installer, and perhaps consider the liquid injection option.

First, have it assessed by a paint specialist, like Graeme Cuthbert (0422 444 335), and get a report on the likely cause. Then take that to Nissan with your claim, if that fails consult the consumer affairs people in your state.

It can happen if someone overtightens the sump plug. The thread can be damaged and distorted, but the usual way of fixing it is to use an oversize plug as has been used on your car. The thread can sometimes be retapped to repair it as well. Replacing the sump seems overkill. If it's not leaking and the oversize plug can be unscrewed and retightened without any problem then I would leave it.

I would be tempted in your case because you do a lot of kays, and because of the issues with the D40 diffs. I probably would take it up.

NISSAN claims the diesel auto will do 9.5 litres/100km unloaded, so yours is doing well over the odds, but finding the answer isn't easy. The tare weight of the diesel auto Navara is about 1950kg and you reckon yours weighs 2900kg with all you have added. I reckon that's the reason for your high fuel consumption. Yours weighs 50 per cent more than the standard ute and your fuel consumption is about 50 per cent more, so I would start by taking everything out and off and driving it in the as-built condition. If your consumption is still high, then you have a case.

IT CERTAINLY sounds as though you have a problem. I got better consumption than that out of the V6 petrol (12 litres for 100km) the last time I drove a D40. Like you, I doubt the economy will improve as the dealer claims. Go back to him and have it thoroughly checked -- the filters, fuel pressure etc.

IF YOU'RE not happy with what the dealer has done, and I reckon you have every right to be unhappy with the fuel consumption you're getting, contact Nissan (ph: 9797 4111) and ask for their technical people to take a look.