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EJK Tuning Fuel Controller


The EJK evolved out of the need to address the ever-increasing complexity of factory fuel injection. For the newcomer to the market or professionals wanting an easier method for tuning fuel injection, the EJK is a customizable solution for the shop that wants to take control of their tuning needs.

GEN 3 is the short term used to describe the Generation 3 Electronic Fuel Injection (EFI) controller manufactured by Dobeck Performance. The GEN 3 was released in 2005 under a private label program. The GEN 3 is a piggy-back EFI controller because it does not replace the stock ECU, but rather monitors the signals to the injectors and makes fuel adjustments based on the mode settings. The GEN 3 has a push button interface allowing access up to 6 different modes to allow for quick fine tuning by the end user without needing a computer.

The GEN 3.5 EFI controller is an extension to the GEN 3 controller. The GEN 3.5 technology was released in 2009 also in the DP private label program. The GEN 3.5 controller has the ability to add or pull fuel within each available fueling zone.


  • Plug N' Play Installation - Minutes to Install, Base Settings are Preset
  • Uses Unique Load Based Technology
  • Offers Full Range Tunability
  • Does Not Interfere with Stock ECU Operation
  • Simple Push Button Adjustment Interface
  • Water-Resistant
  • 2-Year Warranty - Does NOT void any OEM vehicle warranty. Read about the Magnuson-Moss Warranty Act.
  • Compact Size - 2.2" H x 3.4" W x 0.5" D

CARB Release Form


Wondering what one of the bulleted key features actually means? Here we will provide an in depth explanation of each key feature used to market the EJK controller.


How confident are we that the EJK controller uses the best tuning technology there is to offer? We will show you a direct comparision to every EFI controller we know we are competing against.


Learn just how easy it is to adjust the EJK controller. Provides an adjusting demo and also lists the LED displays.

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