This I Build Race Cars FLX01 Flex Fuel Upgrade Kit is a must - have for Subaru owners. It fits a wide range of Subaru models including the 2002 - 2005 WRX, 2004 - 2006 STi, 2004 - 2008 Forester XT, 2005 - 2006 Legacy GT, and 2005 - 2006 Outback XT. The kit's proprietary controller generates its own 12V supply, reducing wiring and installation time while improving reliability. It properly references the ECU 5V power for accurate and consistent data on ethanol content in fuel. With hose assemblies for 08 - 21 STi and WRX in one kit, it simplifies the ordering process. The detachable custom wiring harness makes troubleshooting and repairs a breeze. Since your car has only two TGV plugs for inputs, you can run a maximum of two out of the Secondary Injection Controller, Flex Fuel Sensor, and Fuel Pressure Sensor kits at once. However, the SIC can be wired for power only with a custom harness. This upgrade is ideal for those with unreliable existing flex fuel systems or those planning a custom fuel system. It features a replaceable wiring harness with automotive - grade wiring, eliminates the need for a 12V supply from the rear O2 sensor, allows top - down installation, provides a properly referenced analog output for better accuracy, has a potted housing with a solid pin connector for durability, and requires tuning for flex fuel. The kit includes a Flex Fuel Sensor Controller, a 3 Pin TGV Plug/Wiring Harness, and mounting hardware. Note that it doesn't work with the latest tuning software changes, and your car must be pre - tuned for flex fuel. Usually, retuning isn't necessary when replacing another brand of flex fuel controller. Don't mount the controller directly on the intake manifold and read the installation instructions carefully before starting.
Using this I Build Race Cars FLX01 Flex Fuel Upgrade Kit is quite straightforward. First, make sure your Subaru model (like 2002 - 2005 WRX, 2004 - 2006 STi etc.) is already tuned to run flex fuel. Then, start the installation. You can do it from the top, so there's no need to crawl under the car. Attach the included hardware to mount the Flex Fuel Sensor Controller in a suitable location, but don't mount it directly on the intake manifold. Connect the 3 Pin TGV Plug/Wiring Harness as per the instructions. Remember, since your car has limited TGV plugs, you can only run a maximum of two out of the Secondary Injection Controller, Flex Fuel Sensor, and Fuel Pressure Sensor kits at once. If you want to use all three, wire the SIC for power only with a custom harness. For maintenance, check the wiring harness regularly. It's replaceable, and if you notice any signs of wear or damage, swap it out with a new one. The potted housing with a solid pin connector is durable, but keep it clean and dry. Also, make sure the ECU 5V power reference remains stable for accurate data. If you encounter any issues, the detachable wiring harness makes troubleshooting and repairs easy. Just follow the instructions in the manual to get your system back up and running.
