i spend and average of 10k per week on fuel on My Nissan extera 2001 model. I live at Ajah and work in Lekki, I suttle at least 3 times in a week between my offfice in Lekki and VI, yet i spen this aount on fuel

For me I believe, the vehicle comsumes fuel, what do you think guys.

Is there any service engine soon light lit on your instrument cluster(dashboard)? Take your car for a comprehensive scan. Something is definitely wrong. You can let me know what code you pulled out and I would help out in whatever capacity that I can.

sometin definitely wrong,pls i advice u nt to speed much whn drivin dat car,if it persists,den u nid to go scan ur car

u forgot to tell us if u r using ac,xterra consumes fuel if u r using it

yes i use AC, but going by the distance a cover per day (Ajah to VI) even with the AC, I still find spendig close to 40k on fuel on the high side.

Please where can I go for the car scan within Ajah - VI axis.

@scanthecar, there is no "service engine soon" light on the dash board

surugede: yes i use AC, but going by the distance a cover per day (Ajah to VI) even with the AC, I still find spendig close to 40k on fuel on the high side.

Please where can I go for the car scan within Ajah - VI axis.

@scanthecar, there is no "service engine soon" light on the dash board

try to trigger the CEL by not properly closing your gas tank and starting the engine. If the light doesn't come on it night have been disconnected by someone or the connection is short. You can also post a picture of ur current instrument cluster while the vehicle is started.

Mileage that bad, I'd say you have blocked catalysts

GO AND SELL OFF THAT BASTARD OR ELSE IT WILL REAP YOU OFF. I SOLD MY OWN AND NOW I AM BOUNCING BACK TO LIFE.

nissparts: Mileage that bad, I'd say you have blocked catalysts

Blocked catalysts? so whats the way forward

Same problem here. My neighbour spends 16 ltr from Ajah to airport on his 3.3ltr Xterra but my 3.0 RX 300 uses 26 Lyra to cover same distance.I've been advised to service the injector, change nuzzles and inspect catalyst. What do you think guys?

surugede:

Blocked catalysts? so whats the way forward

Have a technician open up your exhaust to confirm they are blocked. If they are remove them or replace them.

xterra has a high fuel consumption just like the 01 to 04 nissan pathfinder.
but first u need to be specific..how many miles/km do you drive on a full tank ...and what is the capacity of ur tank?
provide the data first and we can analyse ur problem scientifically..........

when u fill up...zero ur trap meter and dont fill up until the tank is empty/the fuel warning light comes on...tells us the reported mileage reading and ur fuel tank capacity then we will calculate ur mpg and compare it with the vehicle manufacturere mpg chikena!

Fabulous Autos: Same problem here. My neighbour spends 16 ltr from Ajah to airport on his 3.3ltr Xterra but my 3.0 RX 300 uses 26 Lyra to cover same distance.I've been advised to service the injector, change nuzzles and inspect catalyst. What do you think guys?

Ok. Here's my experience after posting this yesterday.
I went to Ladipo and was referred to a mechanic who told the engine and emission are in good working condition and will not need to be tampered with. I was advised to service the nuxxle and injector at Mobil filling station and it cost me 5k to do that there. When I discovered that there was no improvement, I did what I should have done earlier and the result shoes, P1155 Air/Fuel sensor Heater Malfunction, Bank 2 Sensor 1.

My advise is for you to scan it first.

First of all, that code is a reference to the oxygen sensor that monitors your catalyst in bank 2.
That oxygen sensor has no bearing on your fuel system as this is controlled by the air/fuel ratio oxygen sensor on top.
You'll get the 1155 either when the electrical connector to the sensor is bad or where your catalyst is bad(which would cause bad fuel mileage)
Do either of you experience engine pinging when you accelerate?

A lot of my friends who use xterra complain bitterly of this fuel consumption issue.My adivice to them was to either get a smaller car that has fuel economy to support the exterra or reduce the xterra daily use by using public trans.Xterra is classified as one of the luxury cars and should not be used on daily basis as other cars like, camry, corolla etc.Buy one of these advise and ursef from unneccessary expenses.Good luck.

nissparts: First of all, that code is a reference to the oxygen sensor that monitors your catalyst in bank 2.
That oxygen sensor has no bearing on your fuel system as this is controlled by the air/fuel ratio oxygen sensor on top.
You'll get the 1155 either when the electrical connector to the sensor is bad or where your catalyst is bad(which would cause bad fuel mileage)
Do either of you experience engine pinging when you accelerate?

Thanks for throwing more light on this. That means it is better to change both catalyst and the bank 2 sensor
The raving is ok, dont experience any pinging while driving. However, I don't warm the car b4 driving off in the early morning and consequently, I sometimes experience some hesitant but it clears off when I step on the gas pedal, and I'm good to go. What do you advise? Thanks once again.

My advise, if your only option for replacement catalyst is a tokunbo then I strongly advise you just remove the catalyst which is blocked and then do what is called an oxygen sensor extender mod (google it).
If you do not do the mod, you will get catalyst codes but your mileage will improve. The mod will ensure you get the best mileage possible with our fuel grade.
You will only need to change the oxygen sensor if you confirm it has a bad electrical connection

change only the bad sensor..leave the catalytic converter alone. a bad cat usually throws off a code..after changing the sensor...if the thing continues...then come and let us know....car troubles are best solved scientifically..one variable at a time

Post cat oxygen sensor has no effect on fuel mileage so if that's his primary issue, the sensor is not responsible.

Thanks for your contributions. I just remembered that the plugs have not been changed ever since it was bought about 2 years back as tokunbor. Before I left town lash week, I switched on the ac few seconds after I turned on the ignition and then tried to engage the gear but the engine went off. I suspect that the plugs are weak. Might be wrong anyway.

Meanwhile, the car revs at 320 at cold start and then settles at 700-750 once the engine warmed up. I noticed recently too that sometimes when I slow down at the junction or at the traffic and the try to accelerate, the car doesn't respond well. I am a light foot driver but I have to press hard in such occasion before it responds. Is this a sign that the plugs are weak, and does the plugs play major role in fuel consumption? Perhaps I have to start by changing the plugs and monitor the fuel consumption. Which plugs would be ideal? Someone suggested platinum plugs earlier.

Well i'll advice you scna the car, Scanning it would give you an insight to where the issue is instead of doing a guess work...You can call me up on 08028290680 for your scan at a reduced price,am always in lekki phase 1 during the week till 3pm...Cheers

Hi,

Change ur plugs. Buy original denso plugs. They are meant for toyota but its perfect on nissan too.

D original plug has a dull silver colour at d metallic part. D fake plugs are shiny in colour.

Have u changed d fuel filter since u bought d car. Look for original big/medium size filters. Nissan cars are designed to change d fuel filters at least every 3 to 4 months.

Then clean ur air filters in d air flow meter compartment

Do not be deceived. D problem is either fuel filter, plugs or air filter.

if d problem persists, service ur injector nozzles with a carburettor cleaner (that spray can) . A good mechanic will not charge u more than N1500 to service it. I service my nozzle by myself.

If after all this, fuel consumption is still high. Check ur engine tune up. It may be that the engine tune up is too high, u have to tune down d engine a little bit. U can adjust d engine where d distributor is.

If after all this no improvement still, u may have to tactfully put up ur car for sale.

Advise: ensure d mechanic u ar used to follows the instructions above.

If it works, just let me know. No fees!!!

08034533668

@Chiebube,
Thank a million. As a DIY, I find your tips VERY HELPFUL. Just realized we've talked some days back. Wish I could go back to 4 Cylinders. They are more easy to fiddle with. I could barely handle rutine maintenance with this car unlike the 4cyls. I've registered your number on my phone.