Quick question about EOCing with the MPGuino

[passat19tdi]

hi
I built me a mpguino, perfectdar I work a little problem
not indicate liters / h when the speed is zero mean you are on the spot
is a problem or it must indicate?
sometimes when the engine is cold and the consumption is greater than 1 liter ralanty show and when consumption decreases and reaches around 0.6 liters indicate when 0 when 0.6 seconds and then nothing.
Is it resistant to 100 kohm too high and reduce the signal so that it mpguino not notice?

Thanks for your help