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Any updates?
Instant mileage is calculated by two values - speed and consumption. If one is bad, then instant mileage is rubbish.
I suggest you check instant speed reading and fuel consumption per hour reading.
They are "almost" raw readings from injector and speed sensors (of course multiplied by pulses/mile and microsec/gallon readings)
* liters/hour or gallons/hour reading in idle should be realistic (what is realistic, depends on your car: 0.5L/h ... 1.5L/h) and not jump around much.
* instant speed should not jump around much, if it does, then there is a problem
* if instant speed is correct and injector signal is missing/bad connection, then mileage jumps to high levels - mpguino thinks you are moving but fuel is not consumed.
Meelis
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