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Fuel Usage Problem
Topic Started: Jan 9 2010, 12:30 AM (539 Views)
sturgey
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hey guys
my is200 has been very very thirsty the last few months and the litre/100km gauge stays on 15l all the time
what would be causing it? O2 sensor?

any help would be appreciated
2000 Lexus Is200
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Leiden
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NZ, Whangarei
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Its hinting that you need a 3SGE transplant :P

Just do a minor service (Air Filter, Plugs, Oil, Oil Filter) and replace the O2 sensor, also pay's to check if you Cat has collapsed, or if there's a problem with the Thermostat, does the motor warm up to temperature?
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sturgey
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yeh temp is fine
have just done oil filter, oil, laser iridium plugs etc
what would be a good aftermarket o2 sensor?
got quoted 345 for a standard 1 from lexus :\
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chukatsung
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the green one
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What is you actual fuel consumption?

The IS200 does a 9.9 on paper (urban + highway)
But if you are getting anything over 20L/100km, even with a heavy foot, something is going wrong (could be you live in a very busy, traffic jam chaos)
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sturgey
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about 350km a tank on daily driving :\
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chukatsung
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the green one
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that's around 17.1L /100km

Do you have the 1GFE? Auto?
What kinda driving habit to you have?
Any highway on your daily driving? (by highway I mean any road over 70kph)
Is that 350km a tank measured when the petrol warning light comes on from a full tank?
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jeremyflower
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It's actually a km/L gauge. If it's staying up on 15 all the time I'd say it's just knackered. If you were getting poor economy it'd be pointing the other direction, closer to 0km/L

What fuel are you running? Higher octane fuels such as 95 or 98 will get you more kms from a tank, or just more power if you have a heavy foot.

My AS200 gets 100km more per tank switching from 91 to 98... food for thought.
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tikboy2007
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jeremyflower,Jan 10 2010
10:48 AM
It's actually a km/L gauge. If it's staying up on 15 all the time I'd say it's just knackered. If you were getting poor economy it'd be pointing the other direction, closer to 0km/L

What fuel are you running? Higher octane fuels such as 95 or 98 will get you more kms from a tank, or just more power if you have a heavy foot.

My AS200 gets 100km more per tank switching from 91 to 98... food for thought.

wow i think i will switch to 98 then as am getting 350-400kms before i get the warning

what do i need to do when i switch read somewhere here ecu(or something) needs to relearn? how do i do that? was it just disconnecting the battery for 10 mins? :P
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mikeyde
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There are two fuses to unplug under the hood, somewhere in the forum there are pics and instructions or you can just disconnect the battery for 10 or 15 minutes to reset the ECU-apparently :)
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tikboy2007
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mikeyde,Jan 10 2010
11:53 AM
There are two fuses to unplug under the hood, somewhere in the forum there are pics and instructions or you can just disconnect the battery for 10 or 15 minutes to reset the ECU-apparently :)

ok thanks

btw my 350-400 is 100% city driving :D
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lonestar
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I Run 98 and get about 550-600Km per tank Driving in Aucklands Traffic.

Just went and saw Hot2XS and did a round trip of 380 per half tank of gas, with the odd burst of speed for over taking.
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tikboy2007
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lonestar,Jan 10 2010
07:44 PM
I Run 98 and get about 550-600Km per tank Driving in Aucklands Traffic.

Just went and saw Hot2XS and did a round trip of 380 per half tank of gas, with the odd burst of speed for over taking.

hmn that's pretty impressive.

i live in inner city though so it's stop and go most of the time. will give 98 a try though hopefully that improves my kms
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jeremyflower
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tikboy2007,Jan 10 2010
10:10 AM
what do i need to do when i switch read somewhere here ecu(or something) needs to relearn? how do i do that? was it just disconnecting the battery for 10 mins? :P

You don't need to do anything, the car will adapt to the new fuel by itself.
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