New Scan Gauge II

On my 2010 Liftback my TPS at closed throttle is 15 and I have the Fuel Cutoff at 19. No problems.

 

TPS 17 have not set fuel cut. Explain the purpose.

 

My guess is to let the SGII know that you are off of the throttle in case the fuel usage does not go all the way to zero.

 

You mean, some kind of control over DFCO? Interesting.

 

What is DFCO?

 

DFCO = Deceleration Fuel Cut Off (where the car uses zero fuel on deceleration)

 

OK. I am not sure how the SGII calculates miles or mpg. I have asked and they say it is proprietary !

 

The Fuel Cut setting is only used for the ScanGauge's instantaneous and average MPG readouts, which I don't use. Average MPG is already provided by the Toyota display, where it is a measured value as opposed to the ScanGauge's estimated value. Instantaneous MPG is not a metric that tells you how much energy you're using, as it neglects energy stored in the battery, kinetic energy, and gravitational potential. It doesn't tell you how efficiently you're using the energy you have, either. What might be useful is "grams of fuel burned since last stop light", so you could try different techniques for each segment of your trip. Sadly, there's no such XGauge.

 

We have the best kind of DFCO: the engine comes to a stop, too.

The ScanGauge is a read-only device. It can affect the behavior of the driver, but not of the car. It doesn't give you control over any engine settings.