DIS real time fuel usage rarely returns to zero?
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Audiworld Junior Member
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DIS real time fuel usage rarely returns to zero?
is it normal to have the real time fuel usage on in the DIS reading anywhere between 4.2L/100km up to 18 or 19L/100km while braking or fully stopped?
very rarely will i see it actually go to 0L/100km while braking or stopped
is this a symptom of another problem? or is this system simply inaccurate?
i tried searching but all i can find are people testing their fuel economy
any input would be greatly appreciated
very rarely will i see it actually go to 0L/100km while braking or stopped
is this a symptom of another problem? or is this system simply inaccurate?
i tried searching but all i can find are people testing their fuel economy
any input would be greatly appreciated
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Stopped as in sitting at idle or while the motor is off? Because if the car is at idle the car will always be using fuel. Only time the car will use zero fuel is while coasting in gear on a manual car.
If I am reading your question correctly.
If I am reading your question correctly.
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Audiworld Junior Member
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kind of
it goes to 0.0 very rarely if i let off the gas and coast, its a 2.8 30V tip
stopped at a red light, the DIS will stay at a fuel consumption number that i usually see while maintaining 60km/h to 100km/h, on rare occasion i will see it at 0 while sitting at a red light
while stopped this number does not change, even in neutral holding steady throttle
and yes as long as the car is running it will be using gas, BUT why is it calculating L per 100km while the car is not moving, if anything the number should go infinite due to the fact the car is not moving but is still using gas, this is why im thinking when i see 0.0L/100km on a rare occasion while stopped, this is correct
it just doesnt make sense, i could figure this out for myself if i knew what sensors where were feeding the real time calculation for fuel usage/distance traveled
just trying to figure out if this is a normal abnormality, or if it is a sign of a sensor failing/electrical quirk or worse, tranny related
it goes to 0.0 very rarely if i let off the gas and coast, its a 2.8 30V tip
stopped at a red light, the DIS will stay at a fuel consumption number that i usually see while maintaining 60km/h to 100km/h, on rare occasion i will see it at 0 while sitting at a red light
while stopped this number does not change, even in neutral holding steady throttle
and yes as long as the car is running it will be using gas, BUT why is it calculating L per 100km while the car is not moving, if anything the number should go infinite due to the fact the car is not moving but is still using gas, this is why im thinking when i see 0.0L/100km on a rare occasion while stopped, this is correct
it just doesnt make sense, i could figure this out for myself if i knew what sensors where were feeding the real time calculation for fuel usage/distance traveled
just trying to figure out if this is a normal abnormality, or if it is a sign of a sensor failing/electrical quirk or worse, tranny related
Last edited by quadroped; Aug 14, 2010 at 06:59 PM.
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It cant go infinite because your still buring fuel, that only happens when the car is not burning fuel.
For the caculation the speed(MPH/KPH) s not being used, it is just using the RPMS and the on time of the injectors. When you see zero is at that slit second when the ecu shuts the injectors off to decrease the rpm's, but then your driveline kicks and the injectors have to open again to keep the motor running.
What your seeing is completely normal for a tip car, which is why it gets worse gas mileage then a manual car.
For the caculation the speed(MPH/KPH) s not being used, it is just using the RPMS and the on time of the injectors. When you see zero is at that slit second when the ecu shuts the injectors off to decrease the rpm's, but then your driveline kicks and the injectors have to open again to keep the motor running.
What your seeing is completely normal for a tip car, which is why it gets worse gas mileage then a manual car.
Thread Starter
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hmm, ok i can see that, but whenever the engine is at idle, shouldnt the number be close to the same every time i look at it (engine warmed up)? not indicating a random fuel usage of traveling between 60km/h and 100m/h? that is alot of fuel to burn at idle, and i do not actually believe its burning that much due to the fact there is no smoke or soot coming out of my tail pipes
and if what your saying is true, then why does the number not change when the car is in neural and revving the engine?
only while the car is moving, the number changes, this is why i believe there is a speed sensor in the calculation somewhere, maybe the maf or tps is feeding this calculation aswell, but what speed sensor....abs? internal tranny sensor? odometer/speedo?
and if what your saying is true, then occationaly my engine burns 0.0L of gas while idling, which again i do not believe
did you build your 600whp a4 or did you pay someone to build it?
and if what your saying is true, then why does the number not change when the car is in neural and revving the engine?
only while the car is moving, the number changes, this is why i believe there is a speed sensor in the calculation somewhere, maybe the maf or tps is feeding this calculation aswell, but what speed sensor....abs? internal tranny sensor? odometer/speedo?
and if what your saying is true, then occationaly my engine burns 0.0L of gas while idling, which again i do not believe
did you build your 600whp a4 or did you pay someone to build it?
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