AuxJection

Need more fueling than the LT4 DI system can support, but don’t want to rely on meth injection or invest in a full port-injection setup?
AuxJection  fills the gap with a clean, factory-style solution that installs easily and integrates seamlessly with the ECM.

How It Works

AuxJection is a fully integrated auxiliary fuel-injection solution engineered to work within your vehicle’s factory ECM—no external controllers, piggybacks, or stand-alone controllers required. By utilizing custom ECM software (file provided after your order) that gets written to the ECM, AuxJection drives additional port-style injectors with the same precision you would expect from the stock controller.

AuxJection’s internal calibration logic uses real-time ECM data to calculate and deliver auxiliary injector pulse width on the fly when a user-specified duration of direct injection window is met. Once the system is installed, the vehicle will tune no differently than if the vehicle came with a higher capacity fuel system stock.

The supplied fuel line set reroutes the low-pressure feed from the DI system at the firewall, through the throttle-body assembly, and returns it to the DI system inlet—allowing the auxiliary system to share the OEM low-pressure circuit without modifying factory hard lines. The plug-and-play harness combined with the pre-made fuel lines make this kit the EASIEST installing product on the market for adding an auxiliary fuel source. 

Each Kit Includes:

• Billet throttle-body flange with matching fuel rail (103mm bore but will fit stock also)
• 2 FID2200 Injectors (pre-installed)
• Pre-made, crimped PTFE AN fuel lines with needed fittings
• Plug-and-play wiring harness

** Flex-Fuel Add-On Options: **

Option 1: No – Kit Will NOT Include Flex-Fuel Sensor or Integrated Harness – Fuel lines, fittings and harness will come as if you are installing this on a stock-fuel-system vehicle from firewall to factory direct-injection pump inlet between supercharger and valve cover.

Option 2: Yes – Use Existing Sensor with Integrated Harness – The plug-and-play harness will come with the flex-fuel sensor wiring/connector integrated into the AuxJection harness and the needed fittings. This is the cleanest option for AuxJection with flex-fuel so all wires going to ECM are on the same harness assembly.

Note: The harness is built for the flex-fuel sensor to be in the same location as the flex-fuel add-on as illustrated in our product photo. If you have an existing flex-fuel kit installed, proper fitment of the fuel lines cannot be guaranteed as the fuel lines are intended to be connected only one way. Existing flex-fuel kit hardware may need to be removed, and you can repurpose your sensor with this kit.

Option 3: Yes – Include Sensor & Integrated Flex-Fuel Harness – this option is best for people wanting to add this system and flex-fuel capability to their vehicle at the same time. The kit will come with harness, fuel line fittings and flex-fuel sensor ready to install seamlessly in the AuxJection system.

Important Notes:

1. Currently supports stock LT4 supercharger-equipped vehicles only. In the near future, more options will be added for aftermarket superchargers that will be supplied with the correct harness/fuel line lengths needed. If you are willing to build your own fuel lines/harness for your vehicle, the kit can be sold on special basis without those items. Please email sales@wisherperformance.com

2. This system adds approximately one inch to the supercharger snout. Depending on your intake, minor tube/couplers modifications may be required for proper clearance.

3. Custom ECM software is REQUIRED. After ordering, you’ll receive detailed instructions and information needed to generate your custom software file. This system WILL NOT function until the modified software is written to the ECM. Tools for flashing the ECM are not included.