epicEFI Firmware Flasher

Quick Start Guide

1. Connect your ECU via USB cable to your computer
2. Click "Connect" — the tool detects your ECU and prepares DFU
3. Download Backup (recommended) — save current firmware and tune
4. Select ECU firmware — pick your board, save the zip when prompted, then load the .bin
5. Flash Firmware — write and confirm
6. Reboot to Normal Mode — leave DFU and start application firmware (or power-cycle)
7. Verify — check version in TunerStudio

Troubleshooting

• Use Chrome or Edge (WebUSB + Web Serial)
• Try another USB cable/port
• Manual DFU: hold BOOT/PROG while plugging in USB

Firmware: content.epicefi.com/firmware