Excessive Fuel Usage.. 22litres To Drive 30km's

[Skyline-man]

Hey guys, i just imported my car and complianced it.

its costing me $20 to drive home and $20 back to work and im only 15 mins

away from work.

Keeping the car out of boost. Whats going on?

- Andrew

[R31Nismoid]

you have a hole in the fuel tank

ive never heard of such bad economy!

Could be the state of tune... or o2 sensors. many things

[paulr33]

what car, what mods, do you get black smoke? do you see any fuel coming out? what happens when you floor it? sounds like dead 02 sensor without knowing any more information

[Blitz]

Could a rich as hell tune even cause THAT sort of fuel consumption.

Im with the hole in the tank possibility

[R31Nismoid]

could be a faulty fuel reg... but even then... i still had 200km's to a tank whe mine died

[Skyline-man]

Hey guys, yeah its really wierd..

mods are 3" exhaust, 3" dump pipe and pod filter..

stock everything else... i took it in to get it looked at they tested it..

the O2 sensor was going nuts, but then he checked another R33 and wa doing the same thing.. i think they are going to change the spark plugs and dyno run it... see whats going on.

- Andrew

[GTR32]

i'm going along with the hole in the tank theory.

[paulr33]

get it dynod and make them do a run at light throttle and medium throttle, should show up mega rich if the 02's are busted. a max power run wont show busted 02's

[Scribble]

Is the smell of fuel strong at any particular point of the car?

Edited October 19, 2005 by Scribble

[FATGTS-R]

Are you sure its using that much fuel? Maybe the gauge is stuffed?

Fill it to the top. Drive around a day or so and then fill it again and cross reference kms to litres.

[ferni]

FATGTS's idea is good.

O2 sensors should only have a minor effect.

[justin911]

is there anyway to tell if the fuel reg is screwed without having to anoy a mechanic ?? any simple checks ?

could be a faulty fuel reg... but even then... i still had 200km's to a tank whe mine died

<{POST_SNAPBACK}>

[R31Nismoid]

slap a pressure gauge on and go for a drive.

you'll soon workout if its working.

although, all you do is rev the car while its sitting there and if it belches some nice fuel cloud then its pretty certain.

Mine filled a workshop with fuel vapour/cloud after a good 5 revs. IT was a big cloud

I checked the pressure like 3 years ago when i shat one... the fuel cloud i knew from, but checked it anyhow as i was bored.

I cant remember what its meant to be

[Josh]

Yeh, I'd go for hole in tank theory... my car runs hell rich, but I don't get economy that bad...

[Zombie]

Are you saying it is using a lot of fuel by reading the gauge?

Cause the fuel level sender can come off its bracket pretty easy. I know mine has done it in the past.

Might be worth checking. Sometimes it is the simple things.

Adam

[elbee111]

Personally, I don't believe you could drive a car that uses over 70 Litres per 100 Kms.

You have got to be losing it somewhere.\

El Bee

[Col-GTSX]

I think i have the worst fuel economy on the forums at 24l per 100km;s but thats due to a very untuned pfc....

[Tommyk]

lol

as above - hole in fuel tank, or your gauge is seriously screwed.

If you were blowing out enough fuel to consume 70L/100 in a reasonably stock gts-t, then im sure you would notice it out the back. your rear window would be tinted

[Big Rizza]

The TV show Top Gear reported getting 4 mpg in a Ford GT40 doing burnouts etc. on a race track. That is about 60L/100kms full throttle on a race track. If you can beat that whilst driving off boost, it can only mean a fuel leak somewhere. I cannot imagine fuel consumption THAT high just from poor tuning.

[CEF11E]

I was thinking huge injectors with PFC in japan and they replaced the

PFC with a stock computer to sell it but even then it would run like shit and not use that much fuel.

I would say you have a leaky injector/s, a hole in the pressurised supply side of the fuel system. or a V8 holden lives in your petrol tank