No Tuner? No Problem. I Installed My Own Flex Fuel Sensor (Holley EFI DIY)

In this video, I show you how I wired and configured a Continental flex fuel sensor to work with my Holley Terminator X system. After some trial and error — and reversing a mislabeled pigtail — the sensor is now reading ethanol content perfectly! This video walks you through the most complete flex fuel sensor install, including: ✅ Correct wiring for the Continental flex fuel sensor ✅ Holley Terminator X input setup (A3 or A4) ✅ Adding a 10k pull-up resistor for signal ✅ Sensor troubleshooting (including reversed power wiring) ✅ Live ethanol content reading with no E85 yet in the tank ✅ Custom IFC fuel multiplier table setup ⚠️ I originally had the 5V and 12V reversed on the pigtail — once I corrected that, the sensor came to life instantly. 0:00 Intro/Tuner Ghosted Me 03:00 Wiring 11:06 Configuring In Holley 15:45 Testing 20:03 Solution/ What went wrong **If you want to support this channel beyond what you're doing now, consider becoming a Sn95 Power Team Member. Members receive a loyalty badge plus membership recognition at the end of every video. End of video recognition includes a photo of your vehicle if you choose. Membership is a monthly fee of $1.99.** #mustang #sn95power #sn95 #TunerLife #HolleyEFI #CoyoteSwap #MustangBuild #FlexFuel #CarMod #TuningGoneWrong #EngineTuning #TunerProblems