Computer: Fuel Consumption

[Arthur Veturis Lurker Find all posts View Profile Close Arthur Veturis]

My HIGHWAY FUEL CONSUMPTION is typically 11.0 - 11.5 L/100km, measured full tank to full tank
But the computer consistently over-estimates fuel consumption by about 15%. Also, the computer's estimated range shortly after filling both tanks is never more than 1000km - this is then a vicious 18 L/100km at best! Does anyone else have the same computer problems?

Arthur

[ON888 Junior Member Find all posts View Profile Close ON888]

Have you had any check engine lights recently?

[Arthur Veturis Lurker Find all posts View Profile Close Arthur Veturis]

Have you had any check engine lights recently?

Nope - nothing like that

[ON888 Junior Member Find all posts View Profile Close ON888]

Interesting. Trip computers usually calculate fuel consumption based on the information it receives from various sensors (ie. air flow meter, a/f sensor, o2 sensor, injector + speed typically). It should definitely indicate more than 1000km estimated range after filling up with 180L. Have you tried resetting your ECU by removing the +ve battery terminal and holding your foot on the brake pedal for 30 seconds then reconnecting?

[Arthur Veturis Lurker Find all posts View Profile Close Arthur Veturis]

I reset the computer. Funny - the range now reflects a reasonable distance after filling up (i.e. about 1500km), but the consumption in l/100km is still overestimating by the original error...