Very High Fuel Consumption?

[NissanNeo25]

Hi guys.

Ive recently bought an auto 1998 stagea with a Neo rb25de and i have noticed that i have been getting around 280km to a tank, this seems pretty low even with around town driving?

I have run a diagnosis and it came back with code 55 which as i understand it means that it is all clear.

It doesnt run rough on start up or when warmed up but it does blow white smoke during high revs.

Possily a faulty o2 sensor??

Im new to the nissan game so just looking for ideas or advice.

Thanks

[Ben C34]

That appears to be abnormally high, but might not be depending on how much fuel you put in the tank.

To be more meaningful it should be litres per hundred kilometers.

I would recommend replacing the O2 sensor on any old car as they all stop working.

Also checking the resistance of the ecu temp sensor (should be able to find that info online) or with a consult cable if you happen to have one checking what temperature the ecu thinks the engine is at when at operating temperature.

I would chuck some new plugs in it for the sake of it and check the timing is set correctly.

So it is non turbo?

[NissanNeo25]

That appears to be abnormally high, but might not be depending on how much fuel you put in the tank.

To be more meaningful it should be litres per hundred kilometers.

I would recommend replacing the O2 sensor on any old car as they all stop working.

Also checking the resistance of the ecu temp sensor (should be able to find that info online) or with a consult cable if you happen to have one checking what temperature the ecu thinks the engine is at when at operating temperature.

I would chuck some new plugs in it for the sake of it and check the timing is set correctly.

So it is non turbo?

Thanks for the tips.

Its around 25L/100km i believe and yes it is non turbo.

[KiwiRS4T]

That's way over the top. I get 12 - 15 l/100km from my RB30 turbo. You should be getting around 12.

On the other hand it is a heavy car and if you keep your foot flat like any car you can get poor mileage.

Replace the O2 sensor (don't think it will make a huge difference) and have a look at the plugs.

Jack the wheels up and make sure no brakes are binding.

Put a timing light on it (put a short lead between the coil and no 1 plug).

Make sure you are measuring the consumption properly (use the trip recorder of which there are two for some reason and calculate when you fill up again).

[Stooge007]

i thought my fuel consumption was high at ~ 13-14L/100km for a stock RS Four S turbo

i've been meaning to change O2 sensor but haven't got around to it yet . . .

Edited March 20, 2014 by Stooge007