Adjust your engine's fuel injection with a model-specific piggyback module without replacing the original ECU
The original ECU determines how much fuel the injectors spray under different conditions. When the intake, exhaust, or engine configuration is modified, the desired fuel requirement may change. With an injection tuning module, you can adjust the injector signal and better tailor the fuel supply to the engine and installed components.
In this collection, you will find EJK Electronic Jet Kit tuning modules for a wide range of engine brands and models. Despite the name Jet Kit, these are not carburetor jets but electronic modules for engines with fuel injection.
The module intercepts the signal between the original ECU and the injectors and adjusts it according to the set values. This allows adding more or less fuel in different driving zones. The original ECU remains in place, and other basic engine management functions are not replaced.
An injection module can be useful when an engine is equipped with a different exhaust, decat, air filter, or a combination of parts that affect airflow. A custom fuel setting can also help when the standard tuning feels rough or jerky in certain areas.
The result varies per engine, configuration, and setting. A tuning module does not automatically provide the same power gain on every engine. The base condition of the engine block, chosen parts, and final tuning remain decisive.
EJK modules are designed to allow adjustments without complicated software. Different fuel zones can be set via the controls on the module. The exact zones and adjustment options vary by generation and engine-specific version.
Preferably use the supplied basic setting as a starting point and change only one value at a time. Record every adjustment so you can always revert to a previous setting.
Always select the module for the exact engine model, year, and specific engine version. Connectors, number of injectors, and original ECU signals can differ. A wrong module may not function correctly, even if the connectors look similar.
For the most accurate tuning, measuring on a test bench with air-fuel ratio control remains the best method. After installation, check all connector connections and route wiring away from heat, sharp edges, and moving parts.
