Thread: Scan Gauge II - With X Gauge

After about 6 fills I am finding the the scangauage fuel usage/distance to go etc is all over the place - it rarely is able to even come close in fuel burn so other functions are out. At least with the car system - add 10% to average fuel usage and deduct 10% from range to empty. The car systems might be 10% wrong but they are consistently 10% wrong ( is there any way to adjust the car system??). Other functions of the scangauge are great though.

On thing - I cannot see in the instructions on how to tell the Scangauge that you have done a partial fill rather than a full fill?? If you do a partial fill everything seems to fall apart??

Thanks

Garry

I would say that for the most part, I fill up at just less than half tank. This is a combination of attempting to provide lots of fuel to act as a heat sink re cooling the internal electric fuel pump and a concern for taking on a full tank of "bad" fuel.

Maybe I do not know what I am doing either, but when I fuel up, I note the volume, (litres in my case), and then:

Push the single button towards the bottom right with the red coloured ring around it.

Push the button opposite where it says MORE

Push the button opposite where it says FILLUP

Then the display in my case shows LITRES, a quantity number, and a couple of arrows < and >. If the quantity number is smaller than the amount I recorded earlier, I push the > button sufficient times to get the displayed number to be the same as the recorded number of litres.

I also note the % number below the quantity number changes. Then I push the save buttons and exit out.

I do that for a couple of fills and if my driving has remained the same - that is stop and go city, or all highway, then for the next fills the fuel quantity will come in within a few tenths of a litre and % change within 1%.

If however the next trip is highway and then city and so on, well the quantity numbers will always be at least 5% and maybe 10% wrong.

For the most part, I use the ScanGauge II for the voltage and water temperature readouts - fuel usage varies too much with where I am driving. In other words, I hope LR does not get rid of the fuel gauge needle as they did the engine oil dip stick on the 4.

Mine took about 8 fills but now is reading spot on. Last time I filled it was to the liter.

Also in the ScanGauge setup, you have to input the fuel tank size, (86 litres for my LR3), the fuel type, (gasoline), and the engine displacement, (4.4 Litres for my petrol V8).

I note that for diesel fuel, there are two different diesel setting options, Diesel A and B, (the instruction book explains the differences but it is not the fuel but is how it gets computed).

You can download the manual from this site.

User Manuals : Linear Logic - Home of the ScanGauge

So I take it that there is no way of telling Scangauge that you have not done a full fill but a partial fill - there doesn't seem to be anything in the instructions.

Is annoying as I am tempted to just put $20 in at a go and not filling it.

Garry

It shouldn't matter once calibrated whether you have done a full or partial fill as scanguage is tracking your usage. Mine has no problem with partial fills. Make sure you are entering the data correctly. The instruction are quite comprehensive for the fuel setup.

Originally Posted by garrycol

On cruise control the engine throttle still stays open a bit (1 litre/100km) even though the car is going faster than the speed set - explains my overruns where the car does not slow down in some circumstances. Without cruise control and throttle closed fuel does go to 0l/100km.

The 3.0 D4s had the same programming until a s/w update, with mine done in April. It makes quite a difference to the extent of overrun, perhaps more so with the 3.0. Perhaps people only started pointing fingers at the programming once they could see consumption figures, causing LR to change their thinking. I wonder if LR have updated the s/w for earlier vehicles too.

Originally Posted by garrycol

So I take it that there is no way of telling ScanGauge that you have not done a full fill but a partial fill - there doesn't seem to be anything in the instructions. Is annoying as I am tempted to just put $20 in at a go and not filling it. Garry

My experience is that you are correct - the ScanGauge inputs do not directly allow for just putting is a few litres of fuel, or it it does, I do not know how.

What I do is just write down the number of litres for each partial fill and then when I do a full tank fill, whatever that quantity is, I add the previous part quantities and the sum should be close to the number that displays when you call up the display for a FILLUP. This also works if you forget to input and reset when you do a full fill up.

The ScanGauge is just a theoretical fuel consumption totalizer between resets. I suppose if you never accessed the FILLUP display, it would go up to 999 or something high like that.