Scangauge Newbie Questions

[Arragonis]

Hi,

A couple of newbie questions about the SG2 if I may, I'm sure they have been covered before and I am going through the manual just now.

The car is a TDI PD 130 ASZ engine code. I know the MPG will be inacurate based on what I have read here but I would like to do a comparison between the SG2, the onboard readout (which is always optimistic) and calculating MPG based on fill ups. Plus I want the other readouts - TPS, MAP and Intake Temps.

1. Calibration - the manual states to put the tank size in but mine is under-reported. The 'official' size is 45 litres (aka 9.9 of the queen's own gallons) but I can regularly get nearer 55 litres in by using the reserve (pressing the vent knob inside the filler neck). Do I put in the official size or what I think it is or something in between ? The manual suggests to understate it I assume so that the range is pessimistic and you don't run out, which would be a bad thing.

2. US vs Imperial - the FAQ states

Does the ScanGauge II support metric units?
Yes, the units of measure can be independently selected between Miles/Km, Gallons/Liters, Celcius/Fahrenheit, and PSI/KPA.
If you choose Km and Liters, fuel economy is reported as liters/100Km (LHK).
If you use Imperial Gallons when you do the calibration, fuel will then be adjusted to use Imperial Gallons.

so as I can't see something that says 'use imperial units' I assume during the calibration step it adjusts based on the fact I tell it so many imperial gallons went into the fillup. Kind of annoying as I want to tell it in litres (fuel is sold in Litres here) but have info in MPG (imperial).

3. Has anyone experimented with using the % adjustment in converting between wimpy sized gallons and the proper sized ones ?

4. If I mess it up during the calibration mind-meld, is there a reset function ? EDIT - I see the clear info now. Up to that page.

5. Any other advice ?

Its been like Christmas all morning, so this is me

And this is Mrs A

[ChrstphrR]

Originally Posted by Arragonis

1. Calibration - the manual states to put the tank size in but mine is under-reported. The 'official' size is 45 litres (aka 9.9 of the queen's own gallons) but I can regularly get nearer 55 litres in by using the reserve (pressing the vent knob inside the filler neck). Do I put in the official size or what I think it is or something in between ? The manual suggests to understate it I assume so that the range is pessimistic and you don't run out, which would be a bad thing.

Use what you think you will normally set as your fill-up level as the tank size.
What you use consistantly should be your baseline "full tank". If that means you leave a reserve, so be it. As is, your car has a low fuel light still - you're going to mind that much more than the amount left on the SG.

And... don't press your luck TOO far below the low fuel light, until AFTER you've had a few tanks to calibrate your SGII to your vehicle. I ran my car 146km past the fuel light coming on, and had to refill the fuel filter to restart the car, the tank was completely dry.

Originally Posted by Arragonis

2. US vs Imperial - the FAQ states

so as I can't see something that says 'use imperial units' I assume during the calibration step it adjusts based on the fact I tell it so many imperial gallons went into the fillup. Kind of annoying as I want to tell it in litres (fuel is sold in Litres here) but have info in MPG (imperial).

Keep a calculator, or a little chart with the litres : Imp. Gallons conversions to one decimal place -- SG II only logs fuel to the 1/10 of a unit. This is where litres might end up being more accurate in the long term.

I actually keep my car's SGII all metric, and have a rough measure of X L/100km : Y mpg chart in the car for when I scrawl down my stats per tankful on the fuel receipt.