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realy s**t house fuel economy (how to fix) 

 

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 Post subject: realy s**t house fuel economy (how to fix)
Posted: Sun Aug 10, 2008 8:17 pm 
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my car is drinking like a b**ch i put $30 in it the other day and i have done 102 kms and its on the red light already the petrol was $1.47/L so the petrol gauge was between quarter and half way
i haven't changed my spark plugs in a year and a half so if i give it a service clean filter new spark plugs should it improve or do i need to change the fuel filter map sensor and o2 sensor
or is that fuel consumption normal for an i6 with a bit of extra throttle here and there

 

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Posted: Sun Aug 10, 2008 8:42 pm 
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gee your fuel is cheap....i am paying $1.69 :cry:

 

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Posted: Sun Aug 10, 2008 9:07 pm 
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i always try to keep mine above half a tank because as soon as i let it get below the half way mark it guzzles the fuel. i let it go below the halfway mark once and i only got around 180-200kms out of the half a tank where as if i drive it on a full tank i get around 350-380 out of the top half of the tank. i dont know why it dose this but that why i never let my EA get below half
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Posted: Sun Aug 10, 2008 9:16 pm 
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ea_monty wrote:
i always try to keep mine above half a tank because as soon as i let it get below the half way mark it guzzles the fuel. i let it go below the halfway mark once and i only got around 180-200kms out of the half a tank where as if i drive it on a full tank i get around 350-380 out of the top half of the tank. i dont know why it dose this but that why i never let my EA get below half



it does that because you fuel gauge isn't reading right. almost every falcon, almost every car i've ever driven does the same thing.

it has NOTHING to do with your car using more fuel on the second 'half' of the tank

 

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Posted: Sun Aug 10, 2008 9:19 pm 
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ok no worries thanks
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Posted: Sun Aug 10, 2008 9:21 pm 
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ea_monty wrote:
i always try to keep mine above half a tank because as soon as i let it get below the half way mark it guzzles the fuel. i let it go below the halfway mark once and i only got around 180-200kms out of the half a tank where as if i drive it on a full tank i get around 350-380 out of the top half of the tank. i dont know why it dose this but that why i never let my EA get below half


Sh#t mines the same i thought it was just me, i always top it up before it gets below the half mark as i to get more K's from first half

 

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Posted: Sun Aug 10, 2008 9:24 pm 
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check the temperature its running at

will use more fuel if its running cold and/ or you are doing a lot of short runs
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Posted: Sun Aug 10, 2008 9:25 pm 
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lol it must just be es then yeah the fueal gauge is s**t house
e.g it moves a s**t loads i can sometimes see it move after a thrashing it rerads hell low then after a while or after i turn on and start the car off it reads higher
i have drivin about 40 or 50 ks on the red light though once or twise

 

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 Post subject: Re: realy s**t house fuel economy (how to fix)
Posted: Sun Aug 10, 2008 9:25 pm 
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Ride: ford falcon au3 xr8

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ea_falcon wrote:
my car is drinking like a b**ch i put $30 in it the other day and i have done 102 kms and its on the red light already the petrol was $1.47/L so the petrol gauge was between quarter and half way
i haven't changed my spark plugs in a year and a half so if i give it a service clean filter new spark plugs should it improve or do i need to change the fuel filter map sensor and o2 sensor
or is that fuel consumption normal for an i6 with a bit of extra throttle here and there


$30 petrol @ 1.47/l will give you about 20 ltrs. so 100 kms on 20 ltrs is good thats about 10 ltrs per 100kms..
im using about 14 ltrs per 100kms..

and dont worrie about the guage mine is the same..
the lower 1/4 to 1/2 of tank seems to go down faster than the first 1/2 tank.
its just the calibration of the guage is not 100% matched to the sender..
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Posted: Sun Aug 10, 2008 9:26 pm 
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the temp is alwasy near the blue line it sits on the N

 

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Posted: Sun Aug 10, 2008 9:28 pm 
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yeah agreed troyman maybe im just used of driving my girlfriends hyudai which takes about 30 a fortnight lol
my car is running realy rich though blowing black smoke and has a harsh petrol smell when im idling so maybe i need to get that looked at to improve the petrol consumption

 

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Posted: Sun Aug 10, 2008 10:16 pm 
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ea_monty wrote:
i always try to keep mine above half a tank because as soon as i let it get below the half way mark it guzzles the fuel. i let it go below the halfway mark once and i only got around 180-200kms out of the half a tank where as if i drive it on a full tank i get around 350-380 out of the top half of the tank. i dont know why it dose this but that why i never let my EA get below half


Sounds like my XH guage - fuel (as noted), oil and voltage. Definately NTS nor of any sense (inconsistent "spacing" for illustrated quantity)

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Lyle
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Posted: Sun Aug 10, 2008 10:48 pm 
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I always laugh when i hear people saying their cars use more fuel at the bottom half of the tank, or the gauge is wrong. There all functioning correctly...

Its the shape of the fuel tank!!! It has slopping sides hence the bottom half of the tank has a lesser capacity than the top. Also take into account that the filler neck also carries a decent amount of fuel so you will be driving for a while until the float on the sender begins to drop down. This can be compensated for by bending the float arm slightly.

A good habit to get in too is too keep your car as full as possible. The more space you leave in the tank the more the fuel has to evaporate to fill the air space, just to have that vapour taken away every time the solenoid valve opens to purge the charcoal canister. So the more fuel you keep in the tank the less the fuel has to evaporate to fill that air space and the more fuel you will save.

 

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Posted: Sun Aug 10, 2008 10:53 pm 
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FLASH thats some good advise and sounds logical to me ayy
thats actually makes a lot of sense what u have said ayy dude cheers

 

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Posted: Sun Aug 10, 2008 11:15 pm 
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No probs :D

 

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