Wiring Injectors
Wire colours for injector outputs 1: Yellow (23)
2: White (11)
3: Red/Black (12)
4: Green/Red (24)
The STINGER 4 ECU controls injectors by pulling to ground. This means that all injectors have a common positive 12 volt rail. The injectors are fired sequentially.
You must ensure that the combined injector resistance for each output is not less than 1.2 ohms. For example connecting 2 X 1.2 ohm injectors in parallel will give a resistance of 0.6 ohms. This would cause the injector output drivers to current limit, if this were to happen then the injectors would not open consistently.
All STINGER 4 ECUs automatically adjust the injector duty to compensate for battery voltage fluctuations ranging from 7 to 16 volts.