Still thinking on the correction at zero on the one injector.
When balancing the air flow through four carburettors then one will/should have its correction path closed off. I'm think that statically for the injectors then the same is true to an extent.
Now this can get very complex but I'm thinking that most ECUs are not that sophisticated for the following reasons
1) there is no per cylinder lamba sensor on most cars thus individual inject/cylinder fuelling level is not monitored based on combustion readings
2) this only leaves an ignition timing / combustion event and as say No:1 combusts the ECU monitors the net acceleration, and does the same for every cylinder fire and then leans or richens the per cylinder/injector ratios to get a smooth rhythmic pulsation of the engine.
3) doing 2) is still possible all based around a chosen "prime" injector.
When balancing the air flow through four carburettors then one will/should have its correction path closed off. I'm think that statically for the injectors then the same is true to an extent.
Now this can get very complex but I'm thinking that most ECUs are not that sophisticated for the following reasons
1) there is no per cylinder lamba sensor on most cars thus individual inject/cylinder fuelling level is not monitored based on combustion readings
2) this only leaves an ignition timing / combustion event and as say No:1 combusts the ECU monitors the net acceleration, and does the same for every cylinder fire and then leans or richens the per cylinder/injector ratios to get a smooth rhythmic pulsation of the engine.
3) doing 2) is still possible all based around a chosen "prime" injector.