Quote:
Originally Posted by gpfaster
Another question is if the app is measuring pump flow or actual delivery to (at) the injectors.
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If you're using an OBD-II plug-in device, it's reading neither.
OBD-II computers
estimate fuel consumption from
air consumption , so fuel use is a calculation based the stoichiometric air/fuel ratio, engine displacement, RPM, MAP/MAF, open/closed loop status etc.).
So it
may not actually know exactly when you're in DFCO. On the ScanGauge, for example, one of the parameters for detecting DFCO is user-settable (throttle position, maybe?).
I find my SG doesn't always report DFCO, or reports it much later than I know it's already happening. On the MPGuino on the other hand, DFCO shows up instantly (because it's directly monitoring fuel injector pulses).