odd question

[KPWSerpiente]

it will pump fuel based on throttle position in order to mix fuel and air

What the hell? Not one of you guys came close to what a fuel injected car does for calculating fuel...and when it comes to talking about what a carbuerated car does...uh, that stuff is old anyway.

Fuel injected cars have an ECU (engine control unit) which aside from a million other functions stores fuel maps that determine how long the fuel injectors will be open based on (I'm simplifying it) the air coming into the engine.
Throttle position has nothing to do with this, except that when you push down on the 'gas pedal' (which only regulates air) the throttle body opens up allowing more air to enter the engine. The ECU will take into account throttle position which can help it anticipate airflow, and will look at the o2 sensor(s) to see what corrections over time need to be made.
Air is measured by something like a MAF/MAS (Mass Airflow Sensor) or a MAP (Manifold Absolute Pressure Sensor) and it is not measured based on time, but on airflow per rpm.

Now, if I made some kind of glaring error slap me and correct it but reading it over I think I gave a good simplified version of how a fuel injected car determines fuel consumption.


So basically...it is more complex than simply high load/low rpm or low load/low rpm and without some kind of logging ability you'll never be certain.

-T