Hello,<rest snipped>
>
> I have been searching to find info on this problem. The car is a
> Mitsubishi Space Star 1.3 16 V 1999.
>
> Normal consumption averaged 6.2 l / 100 km. After a while, but
> suddenly, fuel consumption lowered, starting at 5 l to even 4 l / 100
> km. And this on average and instantaneous rate.
Causes of poor fuel consumption include (in no particular order):
1) Failed / failing lambda sensor (also known as oxygen sensor). See
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2) Incorrect tyre pressures
3) Failed thermostat - does the engine get up to operating temperature OK?
4) Failed temperature sensor - if it gets to the right temperature, does the engine managament system know it?
5) Binding brakes - do any of the wheels feel far hotter than they should? Does the car "Lurch" to a halt, or gently glide to a stop?
6) Fuel leak - should be obvious by the smell! (But I guess if the computer is showing poor economy this is not the case for you..)
and finally, and most obviously
7) Forgetting to remove roof-rack, trailer or caravan ;-)
Ian