Connection Setup
Device Connection
Connect directly to your ECU via Bluetooth or USB
Logging & Recording
Configure and record ECU runtime data for later analysis
Connect to the ECU first — logging requires an active connection.
Connect to the ECU first — marking requires an active connection.
Load an ECU definition (INI) first — the logged fields come from the loaded definition.
Cloud Sync Pro
Connected ECUs
CAN Bus Controllers Pro
Scan for secondary controllers connected to your ECU via CAN bus (e.g. a transmission controller). Scanning is free — adding a controller requires VETuner Pro.
Connect to the ECU first — CAN scan requires an active connection.
Debug Settings
Debug level controls console logging. Trace adds low-level communication timing.
Files
Tune File (MSQ)
Load or download your ECU tune file. Tuning data is automatically synchronised from your ECU on connection and restored from your last session.
Log File
Load a recorded log file (.msl or .mlg) for playback and analysis in the Graph and VE Analysis tabs.
ECU Definition (INI)
The correct INI file is downloaded automatically when you connect to a known ECU. Use this only if you need to load a custom or pre-release definition file manually.
Editor
Select a parameter from the sidebar to start tuning
| Channel | Value | Channel | Value |
|---|---|---|---|
| No data yet | |||
App Settings
Focus Mode
Simplifies the interface to show only essential tuning settings (VE table, injector, spark, and starting). Hides advanced tabs and menus. Adds helpful descriptions to fields. Recommended for new users.
A signed-in account is required to turn Focus Mode off.
Appearance
Choose your preferred color theme or follow system settings.
Start Doctor
When enabled, a prompt appears after connecting to an ECU if the engine RPM is zero, offering to launch the Start Doctor. Uncheck to suppress the prompt.
ECU Writes
When enabled, changes are automatically written to permanent flash memory after each autosave (approximately every 5 seconds). This removes the need to click “Burn to ECU” manually. Disable this if you prefer to control exactly when changes are committed to flash.
External Sensors Pro
Records your position, speed, heading, and altitude alongside ECU data. Adds GPS channels to your gauges and logs automatically. Requires a VETuner Pro subscription and browser location permission.
Connects to a Shelly Pill via Bluetooth to read up to 5 DS18B20 temperature probes. Temperature channels appear in your gauges and logs automatically. Requires Chrome/Edge with Bluetooth support and a VETuner Pro subscription.
Disconnected
Connects to a USB GPS receiver via serial port for accurate position logging and faster update rates. Supports u-blox and NMEA-compatible receivers. Requires a VETuner Pro subscription.
Disconnected
Screen
Prevents the phone or tablet screen from turning off whilst the app is open. Recommended when logging on the move.
Dashboard
When enabled, the gauge dashboard automatically scales to fill the available window width. Disable this to keep gauges at their designed size and scroll horizontally on smaller screens.
ECU Settings
Configure ECU-specific settings defined in the INI file. Changes are applied immediately and stored locally.
Customize Realtime Display
Select which channels to show in the Realtime Display dialog. Changes are saved automatically and persist between sessions.
Subscription
VETuner Pro
A subscription unlocks Advanced Mode - real-time graphing, tooth logger, diff reports, and the full INI-driven menu system.
Project Status & Capabilities
# VETuner — Project Status
What's New
- Jul 2026 — Engine Expert: describe what your engine is doing wrong, and Engine Expert analyses the log to find the cause
- Jul 2026 — CAN tsCanId Fix: per-device CAN ID resolution for multi-ECU setups
- Jun 2026 — Config Health Check: automatic ECU sanity validation on connection, with guided fix wizard
- Jun 2026 — External Temperature Sensors: Shelly Pill BLE integration — monitor up to 5 DS18B20 probes alongside ECU data
- May 2026 — CAN Secondary ECU Support: discover and tune secondary controllers on the CAN bus
- Apr 2026 — Focus Mode: streamlined first-start interface, auto-enabled for new users
- Mar 2026 — Idle Advance Doctor: live idle stability analysis and ignition advance optimisation
- Feb 2026 — Start Doctor: automated cranking diagnostics with tooth logger integration and trigger analysis
- Jan 2026 — Log Playback: replay captured logs through Start Doctor, VE analysis, and all real-time tools
Features
Connection & Setup
- Web Serial / WebUSB direct ECU connection 🆓
- Automatic ECU signature detection and INI loading 🆓
- CAN secondary ECU discovery and tuning 🔵 Pro
- File-only mode (load MSQ, edit offline) 🔵 Pro
Diagnostics
- Engine Expert — describe your symptom, get a structured diagnosis with tuning suggestions 🔵 Pro
- Start Doctor — automated cranking diagnostics 🆓
- Idle Advance Doctor — idle stability analysis 🔵 Pro
- Tooth Logger — crank/cam signal capture and trigger analysis 🔵 Pro
- Real-time multi-channel graph 🔵 Pro
- Log playback through analysis tools 🔵 Pro
Tuning & Tables
- VE table, ignition map, and AFR target editors 🆓
- Interactive heatmap with bilinear interpolation 🆓
- Tune Diff Report — compare current vs original tune 🆓
- Required fuel calculator 🆓
- Multi-page configurable gauge dashboard 🆓
Data & Logging
- Log recording (MLG v2, MSL) with named markers 🆓
- Data Table and Event Log tabs 🔵 Pro
- Session restoration (auto-reload last INI/MSQ) 🆓
- Cloud tune sync 🔵 Pro
External Sensors
- Shelly Pill BLE temperature sensor integration 🔵 Pro
- Up to 5 DS18B20 probes on a single 1-Wire bus 🔵 Pro
- Live gauge display and log recording 🔵 Pro
- Independent data pipeline (no ECU connection required) 🔵 Pro
- GPS Route Map overlay 🔵 Pro
- GPS Tracking 🔵 Pro
Getting Started
New to VETuner? Follow the suggested reading path in the documentation.
Contact
Suggestions? Complaints? Email admin@vetuner.co.uk