Fuel Usage Is Thru The Roof! 16l/100kms

[BASHO]

shii- rb25's only get 300 2 a tank??? how bigs the tank?

R34GTT 64/65ltr .

[mad082]

Thanks so much for your awsome response to my questions :-)

Q1: i try not to get full boost every were, even though full bost is only 5psi!

Q2:I do alot of short trips

Q3:a litle bit of both, start stop and h/way cruisen

Q4: na i dont let the car warm up, it warms up pretty quick. i do have a 52mm alloy radiator in it though and it dose run pretty cool, is that a bad thing? i drove it down from sydeny to melb when i bought it and i was geting 10L/100kms siting on 100km/h i was real real babying it though because it had a cracked radiator full of stop leak LOL :-)

Q5: na dont drive on many hills.

Thanks for you great help :-) much appreciated :-)

how long ago was that? that pretty much says that your oxygen sensor (o2 sensor) is working, because if it wasn't then your economy would've been worse. but still be worth checking to make sure it hasn't died since then.

also doing short trips makes economy worse as the car never comes up to temp properly, so it is running on cold start enrichment for most of the trip, so your economy is down the toilet compared to driving a car that is up to temp.

when you say the car runs pretty cool, is the gauge sitting at around the halfway mark or below it? if below then i'd look at a new thermostat.

the radiator itself shouldn't affect how long the car takes to come up to temp or the temp that the car runs at as the thermostat does that by restricting the flow of the coolant.

basically any positive boost will make your economy get worse, but it's hard to accelerate without seeing positive boost.

as other people have said, check your tyre pressues, as low pressures increase fuel usage. and as someone said above, might be worth getting the timing checked, because if it is a bit retarded then you will have less power, so have to put your foot down a bit more to accelerate. also make sure you are only running the car on 98 octane fuel, because if you are running it on normal unleaded or even 95 octane you won't get quite as much power because the ecu will be backing the timing off, and it's not safe to do. a few other things to consider would be to do a bit of a service on the car and go through and replace things like the fuel filter, spark plugs and clean the AFM and even pull the o2 sensor out and see if it is all gunked up with carbon which might make it not operate at optimum levels. another possibility would be that the catalytic converter is a bit blocked.

[drifta1600]

Check the tuning of your right foot....

Nah seriously take your handbrake off...

Nah even more seriously, make sure there is no unexplicable drag on your car by parking it on a flat (level) smooth surface, place it in neutral and see how easy it is to push..You should be able to move it with just one hand...I had a car once where the handbrake had a habit of overadjusting all the time...This resulted in the handbrake never releasing properly...Skyline handbrakes (drum inside disc) aren't known for this but you never know..

Also check the position of the crank angle sensor...If everything is stock, the CAS should be roughly centred in the adjustment...If it is retarded (rotated clockwise) fuel economy will suffer...

ah thanks mate, will check the CAS tomorrrow :-) aND THE HAND BREAH lol Thanks every one, you all make this a great forum :-)

[drifta1600]

how long ago was that? that pretty much says that your oxygen sensor (o2 sensor) is working, because if it wasn't then your economy would've been worse. but still be worth checking to make sure it hasn't died since then.

also doing short trips makes economy worse as the car never comes up to temp properly, so it is running on cold start enrichment for most of the trip, so your economy is down the toilet compared to driving a car that is up to temp.

when you say the car runs pretty cool, is the gauge sitting at around the halfway mark or below it? if below then i'd look at a new thermostat.

the radiator itself shouldn't affect how long the car takes to come up to temp or the temp that the car runs at as the thermostat does that by restricting the flow of the coolant.

basically any positive boost will make your economy get worse, but it's hard to accelerate without seeing positive boost.

as other people have said, check your tyre pressues, as low pressures increase fuel usage. and as someone said above, might be worth getting the timing checked, because if it is a bit retarded then you will have less power, so have to put your foot down a bit more to accelerate. also make sure you are only running the car on 98 octane fuel, because if you are running it on normal unleaded or even 95 octane you won't get quite as much power because the ecu will be backing the timing off, and it's not safe to do. a few other things to consider would be to do a bit of a service on the car and go through and replace things like the fuel filter, spark plugs and clean the AFM and even pull the o2 sensor out and see if it is all gunked up with carbon which might make it not operate at optimum levels. another possibility would be that the catalytic converter is a bit blocked.

Yer me temp gauge runs at about 2/5ths up the gauge,(is that bad?) a bit below half unless its a hot day it will run at half. IVE hd a few turbos (r32 s14 Datto1600 L20bet) and i would never run me car on anyting but 98 fuel :-) What do ya clean the AFM with? me cats not blocked i checked that, it has a redback cat on it. dosnt look as good as me magnaflow one i had on me 200sx though :-( I drove it back from syd, about 2mnths ago, got i cheap, its a 4door for the misses :-) I got it for 2grand with nsw reg and drove it home, hahahaha turbo auto 200kms good paint and body, interiors as good as they come!... Runs realy good, no smoke, just uses a heapa fuel!

thank you so much for tryn to help me, this forum is awsome with fellas like you here :-)

Edited March 15, 2010 by drifta1600

[JSTA33]

well i get like 350 if i baby it, and about 250 if i give it a few squirts..

but i never fill it right up.

[mad082]

Yer me temp gauge runs at about 2/5ths up the gauge,(is that bad?) a bit below half unless its a hot day it will run at half. IVE hd a few turbos (r32 s14 Datto1600 L20bet) and i would never run me car on anyting but 98 fuel :-) What do ya clean the AFM with? me cats not blocked i checked that, it has a redback cat on it. dosnt look as good as me magnaflow one i had on me 200sx though :-( I drove it back from syd, about 2mnths ago, got i cheap, its a 4door for the misses :-) I got it for 2grand with nsw reg and drove it home, hahahaha turbo auto 200kms good paint and body, interiors as good as they come!... Runs realy good, no smoke, just uses a heapa fuel!

thank you so much for tryn to help me, this forum is awsome with fellas like you here :-)

it sounds like the thermostat may be a little bit dodgy as it should go up to about halfway and not really move even if the temp gets hotter.

to clean the afm, just get some electrical contact cleaner from dick smith or somewhere like that.

[JSTA33]

ok mate.. i have trialed something different. when driving make sure the boost gauge doesnt reach 0, keep it on vac.. you will get a shit load more fuel.. im getting like an extra 200 kays, no joke.

[JZP]

You think that's bad? Try driving a Landcruiser at 20/100!!