Jump to content
SAU Community

O2 Sensor? Tune?

syfon

By syfon,
in Western Australia

 Share

Recommended Posts

syfon Veteran

syfon

Posted
Posted

Hey guys,

First of all, I'm not sure if it is my O2 sensor that may be cuasing this problem, so any advice would be great :D

Last Thursday evening I filled my car up with BP 98 right to the top and have since been driving my Skyline on a daily basis. At the moment I have just under 1/4 of a tank of petrol left and have travelled about 315km's. I am not very happy with the fuel economy my car has been getting. Yes I know, fuel economy has been discussed many times before but I would like to know what can possibly cause sh!tty fuel economy when I have been driving pretty softly.

Yes I have been giving my car the occasional squirt but 90% of the time its just been off-boost driving. Does anybody know the exact capacity of the fuel tank in the Series 2 R33 GTS25-t?

My car has the usual modifications - turbo-back exhaust, FMIC, air-pod, electronic boost controller. However, since I have owned the car, I have not had it tuned. I am planning to install a HKS fuel-cut defender and then have my car tuned soon.

I am just after some reasons as to why I am getting poor fuel economy? Could it be that my O2 sensor is stuffed? The car needs a tune?

Cheers for any help guys :rofl:

Link to comment
https://www.sau.com.au/forums/topic/277239-o2-sensor-tune/
Share on other sites
Dani Boi Grand Master

Dani Boi

Posted
Posted

It says on all websites that the fuel tank capacity is 65L, but I've never been able to fill up over 51L running the needle slightly below E. If your planning on buying a computer or piggyback, buy that first before you get it tuned, that way it will save you having to re-tune it in the future. Your not labouring the engine are you i.e. putting it in 5th at 50km/h or similiar?

Link to comment
https://www.sau.com.au/forums/topic/277239-o2-sensor-tune/#findComment-4689523
Share on other sites
SKYRYAN Grand Master

SKYRYAN

Posted
Posted (edited)

You don't gain power from a fuel pump.

You buy a fuel pump if you need more fuel to the engine (ie. bigger turbo)

Or your stock pump is on it's way out, which after 10-16 years I'm betting it is getting a bit worn. A dyno run to check AFR's and checking the pressure in the fuel line will help determine that.

PS. You can't re-tune the stock ECU.

Edited by SKYRYAN
Link to comment
https://www.sau.com.au/forums/topic/277239-o2-sensor-tune/#findComment-4689638
Share on other sites
Dani Boi Grand Master

Dani Boi

Posted
Posted

No. Service the car if you haven't in a while (Oil & Filter, perhaps air/fuel filter and spark plugs). Then if your still getting poor fuel economy then get yourself an ECU or piggyback then get it tuned, scrap the fuel cut defender I say...

Link to comment
https://www.sau.com.au/forums/topic/277239-o2-sensor-tune/#findComment-4689683
Share on other sites
syfon Veteran

syfon

Posted
  • Author
Posted

How much does a piggy back ecu set you back? As for the fuel-cut defender, my brother brought it and never used it so i can stick it in my car for free if i want lol

It has been around 7500kms since i changed the plugs and 4000kms since last oil/filter change.

Im going to change the plugs/oil filter/oil/air filter etc this weekend

What oil do you guys use? I'm using shell 5w-40, and my cars runs perfect on it:)

Link to comment
https://www.sau.com.au/forums/topic/277239-o2-sensor-tune/#findComment-4689735
Share on other sites
Pattygtst Veteran

Pattygtst

Posted
Posted

when i put my power fc in i didnt notice any better fuel economy. The power was about the same too, the only thing that changed was the delivery of power.

I was getting about 400kms to 45 litres at best. as mentioned above check plugs, fuel & oil filter, 02 sensor.

Link to comment
https://www.sau.com.au/forums/topic/277239-o2-sensor-tune/#findComment-4689759
Share on other sites
Travo Enthusiast

Travo

Posted
Posted

Give it an air leak test.

I had a few bad air leaks around the fmic.

I was getting 320km - 350km to a tank just putting around with the odd boot.

After fixing these leaks I get about 400km to a tank and obviously it drives alot better too.

Link to comment
https://www.sau.com.au/forums/topic/277239-o2-sensor-tune/#findComment-4690607
Share on other sites
bubba Grand Master

bubba

Posted
Posted (edited)

Exactly! but at 315km from 3/4 tank that's really not that bad as far as skylines go.

My 32 tuned rich as struggled to get 300km to a 55L tank, lots of highway driving would see about 400km.

I think the Stag has a 65L tank and that gets about 400km/tank around town (hiflow turbo, 1.8T etc) and on the long trips down south I've managed to stretch it out to nearly 600km/tank.

Edited by bubba
Link to comment
https://www.sau.com.au/forums/topic/277239-o2-sensor-tune/#findComment-4690862
Share on other sites
Dorigecko Proficient

Dorigecko

Posted
Posted

What oil are you using?

I run a 10w in my 25det and i'll get a good 450km out of it easily. but 80% of the driving i do is to perth and back. run pretty much same shit you do except i have had a tune on a piggyback SAFC-II.

Test your AFM. lambda works with that to determine your Air-fuel mix.

Oh, are you running a "de-cat" pipe? if you are, that'll be screwing with your oxygen sensor readings. backpressure = accuracy. like a lotto ball. can never count it until it stops for juuuust a second.

Link to comment
https://www.sau.com.au/forums/topic/277239-o2-sensor-tune/#findComment-4690938
Share on other sites
Davyboy Enthusiast

Davyboy

Posted
Posted
Hey guys,

First of all, I'm not sure if it is my O2 sensor that may be cuasing this problem, so any advice would be great :)

Last Thursday evening I filled my car up with BP 98 right to the top and have since been driving my Skyline on a daily basis. At the moment I have just under 1/4 of a tank of petrol left and have travelled about 315km's. I am not very happy with the fuel economy my car has been getting. Yes I know, fuel economy has been discussed many times before but I would like to know what can possibly cause sh!tty fuel economy when I have been driving pretty softly.

Yes I have been giving my car the occasional squirt but 90% of the time its just been off-boost driving. Does anybody know the exact capacity of the fuel tank in the Series 2 R33 GTS25-t?

My car has the usual modifications - turbo-back exhaust, FMIC, air-pod, electronic boost controller. However, since I have owned the car, I have not had it tuned. I am planning to install a HKS fuel-cut defender and then have my car tuned soon.

I am just after some reasons as to why I am getting poor fuel economy? Could it be that my O2 sensor is stuffed? The car needs a tune?

Cheers for any help guys :)

mate id be happy with 315 and 1/4 left

I have a series 1.5 R33 GTS-T with exactly the same mods as u, (Except splitfire coil packs) and i only get about 320 to a full tank city driving. Stock computers run mega rich man, and even more so when u boost them coz the stock computer is un-tuneable.

An full standalone would be the way to go, because then you can get all your parameters changed depending on if u want power or economy, or a balance of both.

Link to comment
https://www.sau.com.au/forums/topic/277239-o2-sensor-tune/#findComment-4691520
Share on other sites
syfon Veteran

syfon

Posted
  • Author
Posted

Do you guys reckon it is worth getting an SAFC-II for my car and then getting it tuned properly? So that way i can adjust my fuel settings etc.

Also, I am running a catalytic converter, however once i pass pits the de-cat goes back in, I like my flames :)

Link to comment
https://www.sau.com.au/forums/topic/277239-o2-sensor-tune/#findComment-4691630
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      What brakes on R34 GTT(Europe)

      By GTSBoy · Posted

      The 296mm rotors are the R33 turbo brakes. The 310mm rotors are the R34 turbo brakes. The calipers are nearly the same, but not. They're the same caliper but the R34 caliper has longer legs so that it sits out far enough to go over the rotor. The pads are the same for both. When you say, "I bough tsome EBC"....did you just mean pads? Or rotors? 310mm rotors fit under 17" wheels. There may be some wheels without enough clearance though. I can't fit my fingers between the barrel of my wheel and the "corners" of my R34 calipers, but there is plenty of room behind the spokes. This is on Enkei RPF1. You can fit 324mm rotors inside a 17" wheel, but I'd be willing to bet that it would be close to impossible with the Nissan/Sumitomo caliper (using an adapter, of course), because the Sumitomo caliper is fatter than the Brembo caliper that is supposed to go on the 324mm rotors.
    • Kapr
      What brakes on R34 GTT(Europe)

      By Kapr · Posted

      Hi. Can someone tell me what brakes(and mainly WHERE) can i buy brakes on R34 GTT? I bought some EBC which SHOULD go on my car(i have GT but it has GTT brakes) but it does not fit, Brakes are "too" small(296mm) Are 310mm be good or? I have 17 inch wheel so no "big boys" but for me driving i just need one that fits and i can get here in EU/Czech.
    • Marek
      Hi everyone.

      By Marek · Posted

      Since winter isn't that harsh anymore in Poland, i will definetely drive it 365 days a year 😉. But if the snow hits i will try it for sure and let U know. Only swap i am planning to do is of course R34 GTR front 😍.
    • Marek
      WGNC34 - floor mats

      By Marek · Posted

      Hey. Very valuable information about pitwork, I will pay attention when buying any consumable parts 🙏 As for the carpets - I got a handful of information from nengun, from which it appears that indeed the carpets for the driver's side are OEM. They are not able to show me any pictures due to the long chain of different sales entities but after I place the order, as soon as the goods arrive at the nengun warehouse from which they will send the shipment to me they can send me photos and if my purchase differs from OEM I can immediately return it / cancel the purchase. I think I will give it a try 😉. Of course i'll let you know what's what as soon as i get them P.s. I know the topic is not relevant to the thread, but both nengun and amayama have these SICK 😍 trunk room lamps available. Do you know anyone who ordered them? I need to have one in my car
    • ARB26
      S1 Autech 260RS Wiring Diagrams

      By ARB26 · Posted

      I've managed to find this: Nissan_Stagea_AutechVersion260RS (1).pdf
×
×
  • Create New...