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My R34 Is Drinking Alot Of Petrol? Any Help

Tough R34
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Tough R34 Rising Star

Tough R34

Posted
Posted

hi guys,

i just bought my first R34 Skyline and finding it hard to believe that i can only get 300kms per tank when cruising on low boost (6psi).

i understand that they drink alot, but cmon surely i can get more out of this motor? ive recently had a service & tune but ive been told by other rb25det owners that i should be getting more kms.

Can anyone suggest a place that specialises in tuning these motors?? VIC - Melb

cheers

Steve

666DAN Grand Master

666DAN

Posted
Posted

Fuel consumption that severe could be the O2 sensor if you're doing lots of city driving, if you're not it may be pointing at something a bit more drastic.

I'm getting ~330kms from full to empty light first coming on and I've got ~180rwkw and drive it quite spirited most of the time.

If your car is stock standard I'd expect to see at least 450km or more when the empty light first comes on.

Sorry don't personally know of anyone I can recommend down there

satanic Grand Master

satanic

Posted
Posted

Last time I think I read that Nissan want $400+ for a o2 sensor... Repco replacement for the Ford is around $80 :laugh:

I think I might give that a go too... although, when I plugged in the consult gear, the o2 wasn't reading anything abnormal???

Tangles Grand Master

Tangles

Posted
Posted

EL falcon for around $82 from Repco.

Ive read numerous times that an O2sensor is good for only 40000kms, after that replace it.

My Stagea had shitehouse fuel economy, had 80000kms on it when I got it, and got around 230kms per tank (65litres), now after having the O2 sensor replaced I get 430kms per tank (around 60 litres).

RANDY Veteran

RANDY

Posted
Posted (edited)

I changed my O2 sensor.. TWICE, and it makes no difference. I checked both new plugs with some consult software, and they were operating correctly.

I've read hundreds of posts, and I don't recall anyone every saying that it fixed their fuel problems (apart from above) or gave anything more than 20km extra to the tank. =-[

It's not a magic fix, it seems.

I'm now searching for any kind of results from tuning AFR's with a SAFC.

Edited by RANDY
666DAN Grand Master

666DAN

Posted
Posted

Yeah my O2 sensor doesn't affect my economy as I'm mainly doing more than 2500rpm...so the ECU is controlling fuel delivery. My O2 sensor is also a bit screwed with the ceramic/platinum tip snapped and rolling around in the end of the sensor (gives it really slow response)

Tangles Grand Master

Tangles

Posted
Posted
I changed my O2 sensor.. TWICE, and it makes no difference. I checked both new plugs with some consult software, and they were operating correctly.

I've read hundreds of posts, and I don't recall anyone every saying that it fixed their fuel problems (apart from above) or gave anything more than 20km extra to the tank. =-[

It's not a magic fix, it seems.

I'm now searching for any kind of results from tuning AFR's with a SAFC.

whilst I might get way more kms then before, I should state that the Stag has spent a few hours on the dyno with 2 tuning stages, first tuning a SAFC (fuel went from ~230 to ~360), and now with the sitc, if I mother it a bit I'll be in the low 400's as stated, if tromped a lot on boost then high 300's (all before fuel light comes on).

replacing the O2 sensor, I feel, worked in my case. as far as getting GTR ones, Im not sure, Im poor and only have the lowly rb25.

Tough R34 Rising Star

Tough R34

Posted
  • Author
Posted (edited)

ill have a look at the o2 sensor.

I have a 3.5" exhaust and ive also got a power fc that isnt installed yet. Will it help getting it installed????

The Power fc doesnt have a hand controller, so should i buy one or get a mechanic to tune it. are the hand controllers easy to use?

im also getting a back fire in between gear changes, could this be a possible sign for the o2 sensor??

cheers

Edited by Tough R34
SS8_Gohan Grand Master

SS8_Gohan

Posted
Posted

i get about 12l/100km's... you can't really say i get such and such for a whole tank, because the tank is 65, but if you fill up when the fuel light comes on, you'll get like 45 litres in.

i've been doing 15litre fills the last 5-6 times, and getting around 120-130km's from that (when fuel light comes on) which works about to be about 12l/100km's...

you get a bit more accurate idea if you work out the litres/100km as opposed to a "tank" - check how many litres you actually get in the car, when the low fuel light comes on... you're not going to get 60-65 litres in that's for sure

Bass Junky Grand Master

Bass Junky

Posted
Posted

Tough.

Yeah that was me.

I like your wheels. They go well with our colour.

If you haven't tuned your PowerFC, you will get some fairly good returns from a good tuning session.

Backfiring between gearchanges says much to much fuel is being supplied.

Talk to Ice or Racepace or any other reputable tuner and get it tuned.

You'll love it.

I get about 320klms out of 50 litres with normal driving.

If I stick the boot in, I can almost watch the needle going down.

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