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jUST GOT A SCANGUAGE 2. trying to see whats best speed to maintain for my car. How accurate is the scanguage 2? when i put my car in NEUTRAL and coast, am i REALLY getting THAT Much mileage??? And is it better to coast in DRIVE or Neutral???? Alot of questions i nkow. but i just got the scanguage 2. Also, i saw that going 30 mph i was getting lower gas mileage than when i went 45 mph. Is this possible? I mean woudln't going SLOWER make better gas mileage? Just wondering what hyou guys all think .

Higher gearing makes for better gas mileage, so if your transmission is in top gear at 45mph, you may well do better at that speed than at 30mph in a lower gear. Torque converter lockup improves efficiency too - depending on your car, it might only lock up over a certain speed.

-Simon

Yes it's accurate, once you calibrate it to your car. Before that, give or take 10%.
Yes, when you're coasting, you really are getting THAT MUCH mpg. 100-200 mpg. :D
When you're starting from a stop, you really are getting that bad mpg. 5 mpg :(

Better mileage at 45 is normal. The transmission is likely locked in top gear at 45. At 30, it's probably still slipping and losing some efficiency, as well as running higher gear ratios. (higher engine rpm for the same speed, or the same rpm for lower speed = more engine revs for the same distance)

What they said. It's generally better to coast in neutral. Neutral coasting drops your engine rps to 750-800, v. 1200 or more coasting in drive. Plus your engine is still churning up a sea of transmission fluid when you're in gear.

Majorwink -- have you had an opportunity to try out the suggestions above yet?

Hey was it the cutoff??? what does that mean on the scangauge 2?

The cutoff setting is used to determine when the engine is in deceleration fuel cut and not using any gas. That setting is there to let you tune the gauge to correctly note zero fuel usage when in that mode.

But how do you adjust the cutoff???? Also when you Use the fillup application on scanguage II What does the percentages adjustments do????

I just recently go a scanguage 2. I set the Fuel, 1.5 liters . i also set the size of my gas tank ( 11.9 ) so i put it at 11 gallons. Now i HOPE the numbers are RIGHT but i dont see how they could be. Its says i'm getting an average of 50 mpg or more. Now i'd love to believe the numbers. I got this scanguage 2 used i think and it had previous stuff put into it. Then i tried resetting everything and i was averaging on the gauge about 40 something mpg. Now that i've reset it again and put in all my cars stats its saying HUGE numbers. Why???? last time i filled up it was 39mpg and i was supposed to be getting 45 or something?

You have to calibrate it after your first fill-up. If you can't wait, try a 13.5% calibration. That should be pretty close for your 1NZ-FE engine.

When all else fails, read the owner's manual. It's available online at the SG website. Find your TPS at idle, add 4, and that's your cutoff value which you have to set.

How do you Calibrate the Scanguage 2 better? Is that during fillup? I'm completely in the dark about it.

Darrell has addressed the cutoff question above. The percentage offset in the fillup menu is for matching up the fuel consumption calculated by the gauge to what you pumped in (and thus actually used).

BTW Tps is Throttle Position Sensor in case if you are wondering.

For any underlined words with yellow question mark next to them, click on them and it will bring you to a page explaining what those jargons meant.

Out of the box, it probably isn't calibrated for your car. One thing will be correct, higher MPG's will be better than lower, so just try to get the numbers as high as you can, and don't be shocked if they are optimistic. Of course, you may find you really are getting higher numbers than you may think! ;)

When you fillup your gas tank, you'll go to the main screen (push the red circle button), then MORE, then FILLUP. It displays a guess at how much gas you used, based on the factory calibration. You can then change it up or down to display the rounded number of gallons you actually pumped into the car. This is when you want to pick a specific routine, for example, always using the same pump at the same station, always topping off, always stopping at first or second click, etc. After you do this fillup calibration a few times after you fill your tank a few times (only do this when you competely fill your tank, not just adding $10 here and there when you feel like it to bring you from 1/2 to 3/4 tank), you'll find that you'll have to adjust it less and less.

Another thing you'll want to do is calibrate the speed. The speedometer shows a speed, but it may not be accurate. I usually check the displayed speed on Scangauge with a GPS - indicated speed, so that your odometers more closely match.

Hope this helps! And you can help us by actually adding your vehicle to your profile (so it appears next to your screen name, look to the right of my name above this post) in the User CP section, so you don't have to repeat your vehicle every time you post. Also, a general location (city, state) would help give more specific information (temperature, terrain) and maybe you'll find out one of us lives close to you that may be able to help you face-to-face. ;)

One thing that will help with that last adjustment that Brandon mentioned is the fact that for purposes of adjustment you can treat the time portion of the equation as a constant. In other words, you can adjust for distance (d) as easily as you can for speed (d/time). It will be more accurate to adjust the offset based on a long term comparison of miles driven rather than trying to true up the speedometer readouts. (Yes, I know it is called a speed offset but it is the same equation -- use longer distances for better accuracy/precision.)