The G4X GTTLink Plug-In ECU is NOT designed to be used directly with low impedance injectors.
Models are fitted with LOW impedance injectors run via factory fitted ballast resistors. This ECU has been designed to be used with HIGH impedance (greater than 6 Ohms) injectors. Ballast resistors must be wired if low impedance injectors are to be used. This means that the ECU is plug-in compatible with factory fitted injector/ballast combinations on all models. However if fitting low impedance injectors then ballast resistors must be wired. Contact your nearest Link dealer to purchase a ballast resistor pack if required.