2009 Honda Fit Sport

[BlueFoot]

I'll try monitoring the O2 sensor readout on my commute tomorrow. But it doesn't seem like my car has fuel cutoff. On the torque app my mpg will go up to 255 while coasting in nuetral. Coasting in gear it seems to max out around 120.

[California98Civic]

There is no question that an 09 Fit has DFCO. My 1998 Civic has it. And so did much older Hondas, I am told. Honda was somewhat early in applying this technology widely in its car, it seems. Suspect the torque app and the scangauge... they might have settings that need adjustment. My ultragauge had to be set to recognize dfco. If your engine is warm, in gear, and rpms are over 1100 you'll go into dfco within one to 3 seconds as soon as you take your foot off the throttle. Sometimes you can feel it, since the car will often shudder slightly when fuel gets cut.

[digital rules]

I can't imagine the '09 Fit doesn't have DFCO either.

Do your self a favor & get an Ultragauge. You will NOT regret it.

[Fat Charlie]

Think engine braking, not DFCO. DFCO isn't a way to save gas, it's a way of sweetening the deal when you purposely induce drag.

[BlueFoot]

So when exactly would DFCO be advantageous? In every case I can think of, coasting in neutral gives more advantage. I can see the theoretical advantage, but haven't been able to see any practical one.

[Fat Charlie]

When you have a need to slow down a bit more than coasting alone will get you. It happens a lot.

[BlueFoot]

Then maybe the torque app isn't giving me good readouts. I've always seen more advantage coasting in nuetral and using the brakes rather than DFCO on the mpg readouts, or I'm not actually able to get it to do DFCO. But it seems like it should be pretty simple to do DFCO.

[Baltothewolf]

If you decide to want a UltraGauge shoot me a PM, I'm not using mine anymore.

Maybe torque isn't capable of reading when the engine is off? Idk.

[MobilOne]

Fat Charlie, I don't want to hijack this thread, but we could use a thread that describes how different manufacturer's/cars dfco's work. My experience is that they are not all the same.

[BlueFoot]

I just filled up and got a new best tank of 42.48 mpg. The only difference was using the torque app vs my car's readout and more experience with my car. It hit triple digit temps here today, so I'll probably have to start using AC and drop the mpg a bit.