Shown below is the Injection Driver (Entity Tree View>Injection>Injection Driver).

Fuelling Mode:
This determines how the injectors will be timed and fired. Fully Sequential will require a cam sensor, and working settings for it. You can also run batch (where all injectors fire together, once every 720*), grouped, where the odd numbered injector channel in the firing order (defined above in the engine driver) will fire alternately to the even numbered injection channels every 360*, or, you can set it to ‘Off’, whereby no fuel injection events will take place - which is useful for setting base timing without then flooding the engine.

Use IAT in Algorithm:
If you would like the ME221s fuelling algorithm to compute the air density for you, and apply fuel corrections based on the inlet air temperature automatically, you should leave this set to YES. However, if you would instead like to use the Entity Tree View>Enviromental>Inj. IAT Trim to instead manually apply fuelling trims, you should calibrate this table and set the chosen “default” or mapped IAT value in the box below.

In other words, 'Yes' - uses the ideal gas law to determine the mass of air according to the measured temperature, while 'No' - assumes the IAT sensor to always read a constant temperature and relies on the IAT Trim Table to generate the temperature-related corrections.

The latter is normally used on bays that suffer from severe heat-soak and where the IAT readings are not very precise as the bay temperature increases.

Inj Max Duty:
This allows you to set a maximum duty at which point the ECU will failsafe and enable the fuel cut limiter. Typically you should avoid running injection duties over 85%. If you need more than 90% duty to stay at the right AFRs, then you need bigger injectors! You can set this field here as a safety limiter in these events.

Pri Inj Size (cc/min):
Set this to your Primary/Main injectors cc/min flow rate at their test/reference pressure.

Fuel Pressure (kPA):
Enter the actual fuel pressure you are running here. This will then calculate the TRUE flow rate of your injectors. In most cases this number can be the same as your reference pressure (above), and in later versions of the firmware you will be able to set this to an HRT Fuel Pressure Sensor for real-time flow rate corrections.

Inj Ref. Pressure (kPa):
Enter the pressure at which your injectors have the above stated cc/min flow rate.

Fuel Pump Prime Time:
This is how many seconds the fuel pump output should run for once ignition is turned on to prime the system - two to five seconds is fairly typical.

Priming Pulse Settings
The two drop down boxes here allow you to set if priming should take place once you turn the key on, or, if the priming pulse should happen once the engine starts to crank - the varying schools of thought on this meant we would give the tuner the option of either.
The priming pulse (the time all of the injectors are fired for to ‘wet’ the inlet) can we set from the Enitity Tree View>Startup>Priming Pulse table, which is coolant temperature dependant.

Staged Injection

Please see the section on Staged Injection for details on how to use these settings.